LGA 771 to 775 Adapter (MOD) – Run faster Xeon CPUs in a Core 2 Quad motherboard

MODs

2,332 Comments

Table of Contents
  1. List of LGA 771 & 775 CPUs + Current Prices
  2. Where can I get an adapter?
  3. Why would you want to do this?
  4. How does the adapter work?
  5. Minor modification to the LGA 775 socket is also required
  6. Motherboard Compatibility
  7. Recommended LGA 771 Xeon processors
  8. Tested motherboards
  9. Detailed instructions for completing this MOD
  10. Troubleshooting Problems

Tested motherboards

Below you'll find a list of motherboards that have been tested with this MOD.

We've also included some motherboards that should be compatible (based on their specifications) but haven't been tested yet. However, we clearly mark those as Not tested yet, so you can tell the difference.

Predicted compatibility

On most of the motherboards, we've tried to predict what Xeons will be compatible based on the motherboard specifications (like chipset, max FSB, and max TDP), supported LGA 775 processors, and the Xeons people have tested. The prediction should be very accurate in most cases, but since we haven't actually tested all of these ourselves, we can't guarantee it.

We recommend that you also verify compatibility yourself using our LGA 771 to 775 motherboard compatibility guide (which was shown earlier in this guide).

Let us know if this mod worked on a motherboard that isn't in our list

Please leave a comment with your:

  • Motherboard model number (and revision if it has one)
  • Xeon model number (and stepping if you know it)
  • (Optional) chipset, max FSB, max TDP, and supported LGA 775 processors

This will help other people that are also using your motherboard.

Tested Motherboards by Brand
  1. Abit
  2. Acer
  3. ASRock
  4. ASUS
  5. Biostar
  6. Clevo
  7. Dell
  8. DFI
  9. ECS
  10. eMachines
  11. EVGA
  12. Foxconn
  13. Fujitsu
  14. Gigabyte
  15. HP
  16. Intel
  17. J & W
  18. Jetway
  19. Lenovo
  20. MSI
  21. Pegatron
  22. Shuttle
  23. Supermicro
  24. XFX
  25. Zotac
Abit
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Abit AW9D-MAX975X / ICH7R1066≥ 130Q6700, QX6800All 65nm Xeons with a 1066 FSB
Worked: L5320
Abit IL9 Pro945P / ICH71066≥ 65E6700 (see notes)May not be compatible with this MOD.
Not tested yet

Notes:
  • Only supports older 65nm Core 2 Duo processors by default.
Abit IP35 ProP35 / ICH9R1333≥ 130Q9550, QX9650Probably all.
Worked: E5420

Notes:
  • May need to update cpu microcode to support overclocking.
  • Need bios update to support E0 stepping 45nm Xeons
Abit IP35-EP35 / ICH91333≥ 130Q9650, QX9650All
Worked: X5460 (C0), E5472, E5440, E5420
Jump to the bottom or top of this list.
Acer
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Acer Aspire G7700nForce 780i1333≥ 130Q9650, QX9650All
Not tested yet
Jump to the bottom or top of this list.
ASRock
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASRock 4Core1600-GLANP31 / G311333≥ 136Q9650, QX9770All
Worked: L5420
ASRock 4Core1600P35-WiFiP35 / ICH9R1600≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: X5472
ASRock 4Core1600Twins-P35P35 / ich91600≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: L5420
ASRock 4CoreN73PV-HD720pnForce 630i1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450
ASRock 775Dual-VSTAVIA PT880 Pro/Ultra / VIA VT8237A1066≥ 80E6700All
Worked: E5410

Notes:
  • 1333 FSB CPUs will only run at 1066, which means they'll run slower than their reported speed
  • Only older Core 2 Duo CPUs are officially supported
ASRock G31M-GSG31 / ICH71333≥ 105Q9650, Q6600 (all steppings)All
Worked: E5450
ASRock G31M-SG31 / ICH71333≥ 130Q9650, Q6600 (all steppings)All
Worked: X5460, E5410, L5430, E5345
ASRock G31M-VS2G31 / ICH71333≥ 130Q9650All
Worked: E5410
ASRock G41C-GSG41 / ICH71333≥ 130Q9650All
Worked: X5470, X5460, X5450, X5260
ASRock G41M-VS3G41 / ICH71333≥ 130Q9650All
Worked: X5450, E5420, E5205, L5420 (E0, C0)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASRock N7ad slinForce 740i SLI1600≥ 136Q9650, QX9770All
Worked: X5460 (SLBBA E0)
ASRock P43 Pro/USB3P43 / ICH101600≥ 136Q9650, QX9770All
Worked: L5430
ASRock P43D1600Twins-1394P43 / ICH101600≥ 136Q9650, QX9770All
Worked: E5430 (C0)
ASRock P43DEP43 / ICH101600≥ 136Q9650, QX9770All
Worked: 51XX, 52XX, 53XX, 54XX
ASRock P43Twins1600P43 / ICH101600≥ 136Q9650, QX9770All
Worked: E5462 (C0)
ASRock P45DEP45 / ICH101600≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: E5450
ASRock P45DE3P45 / ICH101600≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: L5430
ASRock P45R2000-WiFiP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5460 (SLBBA E0)
ASRock P45TSP45 / ICH101600≥ 136Q9650, QX9770All
Worked: E5430
ASRock P45x3P45 / ICH101600≥ 136Q9650, QX9770All
Worked: E5440
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASRock P45XEP45 / ICH101600≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: X5472
ASRock P5B-DEP965 / ICH81333≥ 130Q9650, QX9650All
Worked: E5450, X5460
ASRock P5D-BEP965 / ICH81333≥ 130Q9650, QX9650All
Worked: E5420 (E0)
Jump to the bottom or top of this list.
ASUS
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS CommandoP965 / ICH81333≥ 130Q9650 beta, QX9650 betaAll
Worked: E5450 (E0)
ASUS Maximus Formula (version 1)X38 / ICH9R1600≥ 136Q9650, QX9770, Q6700, E8600, E6850All 3xxx series Xeons. The 5xxx series is incompatible.
Worked: X3363 (E0)
ASUS Maximus II FormulaP45 / ICH10R1600≥ 150Q9650, QX9770All
Worked: X5492, X5450 (E0), E5450, X5460, X5470
ASUS Maximus II GeneP45 / ICH10R1600≥ 150Q9650, QX9770, Q6700, E8600, E6850All
Worked: X5492
ASUS P5BP965 / ICH81333≥ 130Q9650, QX9650All
Worked: E5450 (C0), E5440, L5430
ASUS P5B DeluxeP965 / ICH8R1333≥ 130Q9650, QX9650All
Worked: E5440 (C0), E5430
ASUS P5B PremiumP965 / ICH8R1066≥ 130Q6700, QX6850All 65nm Xeons
FAILED: L5410 (C0)

Notes:
  • The 45nm L5410 that was tested was very unstable in Windows (freezing).
ASUS P5B SEP965 / ICH81333≥ 136Q9650, QX9770All
Worked: L5420 (C0)
ASUS P5B-EP965 / ICH8R1333≥ 130Q9650, QX9650All
Worked: E5450
ASUS P5B-PlusP965 / ICH8R1333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: X5450

Notes:
  • 1333 FSB reported to also work automatically (even though 1066 is the max officially supported)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5B-VM DOQ965 / ICH8DO1066 (official), 1333 (reported to work)≥ 95Q6700 (official), probably Q9650Probably all
Worked: E5440
ASUS P5E-DeluxeX48 / ICH9R1600≥ 136QX9770, Q9650, Q6700, E8600, E6850All 3xxx model Xeons.
Not tested yet
ASUS P5E-VM DOQ35 / ICH9DO1333≥ 130Q9650, QX9650, Q6700, E8600, E68503xxx series
FAILED: E5410 (E0), L5420

Notes:
  • 1 person reported an E5410 (E0) worked on this board, but 2 other people confirmed that a 5xxx series Xeon didn't work for them, so 5xxx series Xeons are probably not compatible with this board.
ASUS P5E-VM HDMIG35 / ICH9R≥ 1333≥ 130Q9650, QX9650All
Worked: X5450 (C0), L5420
ASUS P5G41-M LEG41 / ICH7≥ 1333≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: E5420 (E0)
ASUS P5G41C-MG41 / ICH71333≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: X5470
ASUS P5G41C-M LXG41 / ICH7≥ 1333≥ 95Q9650, Q6600 (95W only)All
Worked: E5420, E5405 (E0)
ASUS P5G41T-M LXG41 / ICH71333≥ 120Q9650, Q6600 (95W only)All
Worked: E5472, X5460, X5450, E5420 (E0), L5420, E5405
ASUS P5G41T-M LX PlusG41 / ICH71333≥ 130Q9650, QX9650All
Worked: E5450, X5460 (SLBBA)
ASUS P5G41T-M LX2/BGG41 / ICH7≥ 1333≥ 150Probably Q9650All
Worked: X5492
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5G41T-M LX3G41 / ICH7≥ 1333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: X5460, E5440, E5345
ASUS P5G41T-M SIG41 / ICH71333≥ 136Probably Q9650, QX9770Probably all
Worked: E5420
ASUS P5G41T-m7 Lx2BRG41 / ICH7≥ 1333≥ 80At least Q9550 (C0). Q9650 probably also supported.Probably all
Worked: E5450

Notes:
  • Couldn't find cpu support list, so can't verify if Q9650 or E0 steppings are supported
ASUS P5KP35 / ICH91600≥ 136Q9650, QX9700Probably all
Worked: X5460 (E0 & C0), X5450 (E0 & C0), E5450 (C0 SLANQ), E5440 (E0), E5430, E5420 (E0), L5420 (E0), X3363

Notes:
  • 1 report of an unstable X5482 at stock speeds, but it worked after reducing the speed.
ASUS P5K DeluxeP35 / ICH9R1600≥ 136Q9650, QX9700All
Worked: E5430, L5420
ASUS P5K PremiumP35 / ICH9R1600≥ 136Q9650, QX9700All
Worked: E5472 (C0), E5420, L5420
ASUS P5K ProP35 / ICH9R1600≥ 136Q9650, QX9700All
Worked: E5440 (C0), X5450
ASUS P5K SEP35 / ICH91600≥ 136Q9650, QX9770All
Worked: E5450, X3363
ASUS P5K SE/EPUP35 / ICH91600≥ 136Q9650, QX9770All
Worked: X5460 (C0), E5450

Notes:
  • 1 report of an unstable E5462 with 1600 FSB (downloads corrupt archives, some .EXE files stopped working). User didn't have these problems with 1333 FSB Xeons. Said Xeon microcode update didn't help.
ASUS P5K-EP35 / ICH9R1600≥ 136Q9650, QX9770All
Worked: E5450 (E0), E5440, E5430, X5450
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5K-VMG33 / ICH91333≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: X5460, E5440
ASUS P5K/EPUP35 / ICH91600≥ 136Q9650, QX9700All
Worked: E5440 (C0 stepping)
ASUS P5K3 DeluxeP35 / ICH9R1600≥ 136Q9650, QX9770All
Not tested yet
ASUS P5K64 WSP35 / ICH9R1333≥ 136QX9770, Q9650, Q6700, E8600All
Worked: X5470
ASUS P5KCP35 / ICH91600≥ 136Q9650, QX9770All
Worked: X5450 (C0), E5450, E5420 (E0)
ASUS P5KLP SEG31 / ICH71333≥ 136Q9650, QX9770All
Worked: L5410
ASUS P5KPLG31 / ICH71333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: X5460 (E0)
ASUS P5KPL AM/PS (rev. 2.01G)G31 / ICH71333150Q9650, QX9770All
Worked: X5482
ASUS P5KPL SEG31 / ICH71333≥ 136Q9650, QX9770All
Worked: X5450, E5440
ASUS P5KPL-AMG31 / ICH71333≥ 136Q9650, QX9770All
Worked: E5450 (SLANQ), X5460 (SLANP), X5450 (E0), L5420
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5KPL-AM EPU (rev. 1.01G)G31 / ICH71333≥ 136Q9650, QX9770All
Worked: X5450 (E0), L5420
ASUS P5KPL-AM SE (rev 1.01G)G31 / ICH71333≥ 136Q9650, QX9770All
Worked: X5460, E5472 (E0), E5450 (C0), E5440 (E0), E5420, E5410, L5420, L5410

FAILED: E5405

Notes:
  • Couldn’t load bootloader with E5405 (which worked fine in other motherboards)
ASUS P5KPL-CMG31 / ICH71333≥ 136Q9650, QX9770All
Worked: X3323
ASUS P5KPL-VMG31 / ICH71333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: L5420
ASUS P5KPL/1600G31 / ICH71333≥ 136Q9650, QX9770All
Worked: L5420
ASUS P5KRP35 / ICH9R1600≥ 136Q9650, QX9770All
Worked: L5420
ASUS P5N-DnForce 750i SLI (C72P) / nForce 430 (MCP51)1333≥ 130Q9650, QX9650Mixed results on whether the mod works well on this motherboard. See the notes below.
Worked: E5450, X5460 (C0)

Notes:
  • Two people have reported instability problems (not the ones in the working list) with X5460 (C0) and X5450 (C0)
  • Not sure, but may be due to not fully resetting the BIOS (through jumper or removing CMOS battery)
ASUS P5N-E SLInForce 650i1333≥ 130Q6700, QX6850, and unofficially Q9650Probably all
Worked: X5450
ASUS P5N-EM HDMInForce 630i1333≥ 130Q9650, QX9650All
Worked: X5260
ASUS P5N-MXNVIDIA GeForce 7050 / nForce 610i1333≥ 130Q9650, QX9650All
Worked: E5450 (C0)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5N-T Deluxe (rev. 1.02G)nForce 780i SLI / nForce 570 SLI1333≥ 136Q9650, QX9770All
Worked: E5450
ASUS P5N32-E SLInForce 680i SLI≥ 1333≥ 130Officially: Q6700, E8600, E6850, QX6850Probably only supports 65nm quad core Xeons by default (see notes).
Worked: X5460 (C0)

Notes:
  • Only officially supports 65nm quad core processors
  • Probably needs Xeon microcode update to support 45nm quad core
  • Wasn't able to overclock stably (even with microcode update)
ASUS P5N73-AMnForce 610i1333≥ 130Q9550 (E0), QX9650, Q6700, E8500, E6850All
Worked: X5460
ASUS P5N7A-VM (rev. 1.04G)GeForce 9300 / nForce 730i≥ 1333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: X5470
ASUS P5NT WSnForce 680i SLI1333≥ 130QX6850, Q6700, E8600, E6850All (see notes)
Worked: X5450 (E0)

Notes:
  • Only officially supports 65nm quad core CPUs, but someone reported a 45nm X5450 worked.
ASUS P5P43TD (rev. 1.00G)P43 / ICH101333≥ 130Q9650, QX9650All
Worked: X5460 (E0), E5450, X5450
ASUS P5P43TD PRO (rev. 1.02G)P43 / ICH10R1333≥ 136Q9650, QX9770All
Worked: X5460
ASUS P5QP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5450, E5430 (SLANU), X5450, E5462 (E0), L5430
ASUS P5Q DeluxeP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5470, X5450, X5460 (E0)
ASUS P5Q PremiumP45 / ICH10R1600150Q9650, QX9770All
Worked: X5492, X5470
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5Q ProP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5470, X5460, E5450, E5462, E5430, E5440
ASUS P5Q Pro TurboP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5470, X5460, E5450, E5472

Notes:
  • 1 person reported needing to reinstall Windows before the system would boot (not sure if everyone will need to do this).
ASUS P5Q SEP45 / ICH101600≥ 136Q9650, QX9770, Q6700, E8600, E6850All (see notes)
Worked: E5450

FAILED: E5472

Notes:
  • 1 person reported an E5472 (1600 FSB) was unstable but an E5450 worked fine, so you may want to stick with 1333 FSB Xeons.
ASUS P5Q SE PLUSP45 / ICH101600≥ 150Q9650, QX9770All
Worked: X5492 (E0), E5472 (E0), E5450 (C0), L5420 (SLBBR E0)
ASUS P5Q SE/RP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5450
ASUS P5Q SE2P45 / ICH101600≥ 136Q9650, QX9770All
Worked: X5472, E5420 (SLBBL)
ASUS P5Q TurboP45 / ICH10R1600≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: X5450 (E0)
ASUS P5Q-EP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5450, E5440, X5470, X5460, L5430
ASUS P5Q-EMG45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5470, X5460 (SLBBA), E5450, L5420 (E0)
ASUS P5Q-SE2 (rev. 1.00G)P45 / ICH101600≥ 136Q9650, Q6700, Q6600, QX9770All
Not tested yet
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5Q3 (rev 1.00G)P45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5450, E5472, L5430, L5420
ASUS P5Q3 DeluxeP45 / ICH10R1600150Q9650, QX9770All
Worked: X5470, E5450 (C0), X5460 (C0), E5440 (C0), X5450 (E0 & C0), E5420 (E0), E5462, X5482 (E0), L5420 (E0), E5472
ASUS P5QCP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5482 (C0), E5472 (E0), E5462 (C0), E5450 (C0), E5440 (C0), E5430 (C0)
ASUS P5QD TurboP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5472, E5450 (E0)
ASUS P5QL PROP43 / ICH101333≥ 136Q9650, QX9770All
Worked: E5410, E5450, x3353
ASUS P5QL-EP43 / ICH10R1333≥ 136Q9650, QX9770All
Worked: X5470, E5450, L5420
ASUS P5QL-VM EPU (rev. 1.01G)G43 / ICH101333≥ 130Q9650, QX9650All
Worked: X5460
ASUS P5QL/EPU (rev 1.00G)P43 / ICH101333≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: X5470
ASUS P5QLD PROP43 / ICH101333≥ 136Q9650, QX9770All
Worked: X5450 (C0)
ASUS P5QPL-AM (rev. 1.00G)G41 / ICH71333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: E5450 (E0)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ASUS P5W DH Deluxe975X / ICH7R1066≥ 150Q6700All (see notes)
Worked: X5450 (E0) (see notes), E5405 (E0)

Notes:
  • You can probably run 1333 FSB CPUs if you underclock the FSB (this will also run the CPU at a lower speed)
  • X5450 required underclocking to 2.8 GHz to be stable. They also added Xeon microcode.
  • ASUS says 1333 FSB isn't supported.
ASUS P5WDG2 WS Professional975X / ICH7R≥ 1333≥ 130Q9550 (C0), Q6700, E8500 (C0), E6850Probably all
Worked: X5450 (C0)

Notes:
  • CPU support list doesn't list the Q9650 as compatible, so E0 stepping Xeons may not be supported without a BIOS MOD
ASUS PN57A-VM≥ 1333≥ 120At least Q9550 (C0)Probably all
Worked: X5450 (C0)

Notes:
  • Couldn't find cpu support list, so can't verify if Q9650 or E0 steppings are supported
  • 1 reported they needed to disable "C State Tech" in BIOS to stop slow booting and high CPU usage
ASUS Striker ExtremenForce 680i SLI (C55XE) / NVIDIA MCP55XE1333≥ 130Q6700, E860065nm quads (officially), but reported to also work with 45nm quads
Worked: X5460
ASUS Striker II ExtremenForce 780i SLI (C73XE rev. B1)1600≥ 136Q9650, QX9770All
Worked: E5472 (SLANR C0)
ASUS Striker II FormulanForce 780i SLI (C55XE)1333≥ 136Q9650, QX9770All
Worked: X5470
Jump to the bottom or top of this list.
Biostar
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Biostar G31-M7 TEG31 / ICH7133395Q9650, Q6700, E6850All
Not tested yet
Biostar G41 DVIG41 / ICH7133395Q9550 (C1 stepping), Q6600 (95w only)All
Worked: E5450
Biostar G41D3+G41 / ICH7133395Q9550 (C1 stepping)At least C0 stepping Harpertown Xeons; Maybe also E0 stepping
Worked: E5430
Biostar g41D3CG41 / ICH7133395Q9550 (C0), E8600, E6850All (see notes)
Worked: E5450 (E0)

Notes:
  • Although the CPU support list doesn't show Q9650 as supported, the BIOS does contain the microcode for it, so it should work.
  • Person running E5450 said they got an error message that the CPU was over 95 W (even though it wasn't). Press F10 to bypass and boot the system anyways. Adding the Xeon microcode to the BIOS may fix this problem.
Biostar P35D2-A7P35 / ICH91333≥ 115Q9300 (officially)Probably all (see notes)
Not tested yet

Notes:
  • Core 2 Quad Q9650 isn't listed in the CPU support list, but the BIOS contains the CPU microcode for it, so all 45nm quad core Xeons will probably work.
Biostar P43D2-A7P43 / ICH10≥ 1333≥ 105Probably Q9650All
Worked: E5450
Biostar TForce P965P965 / ICH81333≥ 130Q6600, E6850All 65nm Xeons
Not tested yet

Notes:
  • No 45nm CPU microcode in BIOS
Biostar TP43D2-A7P43 / ICH101333≥ 105Q9550 (SLAWQ)Probably all
Worked: E5440
Biostar TP43E XE (ver 5.x)P43 / ICH101333≥ 136Q9550 (E0 stepping), QX9770All
Worked: E5472, L5420
Biostar TP45D2-A7P45 / ICH101333≥ 120Q9650, Q6600, E8500, E6850Probably all
Worked: X5460, E5472, X5450, E5410 (C0/E0), L5408, E5310 (B3/G0)

Notes:
  • CPU support list is out of date
  • May need to add Xeon microcode
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Biostar TPower i45 (ver 5.x)P45 / ICH10R1333≥ 136Q9550 (E0 stepping), QX9770All
Worked: X5450
Jump to the bottom or top of this list.
Clevo
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Clevo D900CP965≥ 1333≥ 95Q9650Probably all
Worked: E5450
Clevo D901CP965 / ICH8R≥ 1333≥ 95Q9650Supports all 3xxx series Xeons. The 5xxx series may be incompatible.
Worked: X3363

FAILED: E5450

Notes:
  • The E5450 and X3363 were both tested by the same person
  • I think this is a special desktop/laptop hybrid, so it’s definitely not a typical system.
Jump to the bottom or top of this list.
Dell
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Dell Inspiron 518G331333≥ 120Q9650, Q6700All
Worked: X5450, E5450
Dell Inspiron 530 (DG33M03 motherboard)G33 / ICH91333≥ 95Q9650All
Worked: E5450 (E0), E5440 (E0)
Dell Inspiron 530/530s (G33M-02 motherboard)G33 / ICH9133380Core 2 DuoProbably all dual core Xeons
Worked: X5160, X5270
Dell Inspiron 535/535s (G31T-DM motherboard)G31 / ICH9R≥ 1333≥ 120Q9650All
Worked: X5470
Dell Inspiron 545/545s (DG33M-05 motherboard)G33 / ICH9R1333≥ 120Q9650All
Worked: X5470
Dell Optiplex 330 (KP561 motherboard)G31 / ICH7R1333≥ 95Q6700; Q9550 (C0 stepping)Doesn't fully support E0 stepping Xeon processors, so you may run into issues with those, but the C0 stepping Xeons have been reported to work fine.
Worked: E5450 (C0 stepping), E5440 (C0 stepping), 5160
Dell Optiplex 360 (T656F motherboard)G31 / ICH71333≥ 95Q9550 (C0 stepping)Doesn't fully support E0 stepping Xeon processors, so you may run into issues with those, but the C0 stepping Xeons have been reported to work fine.
Worked: E5440 (C0 stepping)
Dell Optiplex 380 (HN7XN motherboard)G41 / ICH7≥ 1333≥ 95Probably Q9650Probably all
Worked: E5450 (C0 stepping)
Dell Optiplex 755 (Y225C motherboard)Q35 / ICH9DO1333≥ 95Q9650Supports all 3xxx series Xeons. The 5xxx series is incompatible.
Worked: X3363 (E0), X3323

FAILED: E5440

Notes:
  • Should work with all form factors
  • Need to reset BIOS through jumper on motherboard
Dell Optiplex 760 (M859N motherboard)Q43 / ICH10≥ 1333≥ 95Q9650, E8600 (no 65nm support)Should support all 45nm 3xxx series Xeons. The 5xxx series isn't supported, and 65nm Xeons probably aren't supported.
Worked: X3363
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Dell Optiplex 780 (G785M motherboard)Q45 / ICH10DO1333≥ 95Q9650All 3xxx series Xeons. The 5xxx series is incompatible.
Worked: X3363

Notes:
  • Should work with all form factors (except USFF)
Dell Precision T3400 (TP412 motherboard)X381333≥ 130Q9650, QX9650All 3xxx series Xeons. The 5xxx series is incompatible.
Worked: X3363, X3323, X3360
Dell Studio 540 (M017G motherboard)G45 / ICH10R≥ 1333≥ 120Q9650, Q6700Not stable (see notes)
FAILED: See notes

Notes:
  • Multiple people have reported that Xeons don't run at the correct speed and that the BIOS does not support Xeon microcode, so the system may not be stable
  • Don't recommend trying the mod with this motherboard.
Dell Vostro 200 (with G33M02 motherboard)G33 / ICH9≥ 1333≥ 80Dual core onlyAll dual core
Worked: X5260, 5160
Dell Vostro 220 / 220s (with G45M03 motherboard)G45 / ICH10R≥ 1333≥ 120Probably Q9650All
Worked: X5470, X5450, X5365, E5450
Dell Vostro 230 / 230s (MIG41R motherboard)G41 / ICH7≥ 1333≥ 120Probably Q9650All
Worked: X5450
Dell Vostro 400 (with G33M03 motherboard)G33 / ICH91333≥ 120Q9650All
Worked: X5470, X5365
Dell Vostro 410 (DG33A01 motherboard)G33 / ICH9≥ 1333≥ 120Probably Q9650Probably all
Worked: X5450

Notes:
  • Couldn't find cpu support list, so can't verify if Q9650 or E0 steppings are supported
Dell Vostro 420 (G45A01 motherboard)G45 / ICH9R133395Q9650Probably all
Worked: X5450 (see notes)

Notes:
  • Recommend going with 95 W and lower CPUs only
  • X5450 (120 W) wasn't stable until the multiplier was reduced from 9 to 8, which reduced the speed. Also needed to disable Speedstep in the BIOS.
Dell XPS 430X48133395Q9650All 45nm 3xxx model Xeons
Worked: X3363
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Dell XPS 630inForce 650i SLI1333≥ 120Q9650, Q6600, QX6800All
Worked: X5470, X5460 (C0), E5420 (C0), X5365
Dell XPS 720nForce 680i SLI≥ 1333≥ 130At least Q6600, QX6800Should support all 65nm quad core Xeons.
Worked: X5365

FAILED: X5470 (45nm)
Dell XPS 730 (F642F CN-0F642F)nForce 790i1600≥ 136Q9650, QX9770All
Worked: X5470
Jump to the bottom or top of this list.
DFI
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
DFI Blood Iron P35-T2RLP35 / ICH9R1333≥ 130Q6700, E6850All (see notes)
Worked: E5450 (E0)

Notes:
  • Looks like only 65nm CPUs are supported by default, but you can likely run 45nm Xeons if you update the microcode before installing the CPU.
DFI Lanparty DK P45-t3rsb PLUSP451333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: E5440

Notes:
  • 1 person reported an E5440 didn't work (tried adding xeon microcode and adapter and Xeon worked in another system). However, since it worked for another person with an E5440, it's likely some other installation error causing the problem (like not cutting the socket tabs off correctly).
DFI LANPARTY JR GF9400-T2RSGeForce 94001333≥ 130Q9650, QX9650All
Worked: X5460
DFI LP DK P35-T2RSP35 / ICH9R≥ 1333≥ 130Q9650, QX9650All
Worked: 5450 (E0)
DFI LP UT P35-T2RP35≥ 1333≥ 130Q9550, QX9650, Q6700All
Not tested yet
DFI P45-T2RSP45 / ICH10R1333≥ 130Q9650, QX9650All
Worked: X5460
Jump to the bottom or top of this list.
ECS
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
ECS G31T-M7G31 / ICH7≥ 1333≥ 95Q9650, Q6700, E8600, E6850All
Worked: E5440, E5430
ECS g33t-am From Philips desktopG33 / ICH91333≥ 95Q6700All 65nm
Worked: E5345

Notes:
  • Acer uses the same motherboard
  • Used Acer bios to add Xeon microcode
ECS G41T-M12G41 / ICH71333≥ 95Q9650 (no Q6600 support)All
Not tested yet
ECS G41T-M7 (rev. 1.0)G41 / ICH71333≥ 95Q9650, Q6700, E8600All
Worked: E5440 (C0)

Notes:
  • Disable C1E in BIOS if your system seems slow
  • Had to add Xeon microcode to enable SSE 4.1
ECS P4M800Pro-M (v2.0)VIA P4M800Pro / VIA VT8237R+1066 (officially)≥ 95Officially only 65nm dual coreSee notes
Worked: E5450 (C0)

Notes:
  • Add latest Xeon microcode to BIOS to enable 1333 FSB, 45nm, and quad core support
Jump to the bottom or top of this list.
eMachines
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
eMachines EL1830nForce 630i1066≥ 50?Probably supports all 50W and lower 65nm Xeons.
Worked: L5320
Jump to the bottom or top of this list.
EVGA
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
EVGA 730inForce 730i1333≥ 80?At least 65nm dual core Xeons. Not sure about quad core.
Worked: 5160
EVGA 750i FTWnForce 750i SLI / nForce 4301333≥ 136Q9650, QX9770All
Worked: X5470, X5460
EVGA 780i SLI FTWnForce 780i1600≥ 150Q9650All
Worked: X5492, X5460 (E0)
EVGA 790i FTWnForce 790i SLI1600≥ 130Q9650, QX9650All
Worked: X5470
EVGA NF66nForce 650i Ultra1333≥ 95Q9650All
Worked: E5450
EVGA nForce 680i SLI (122-CK-NF68)nForce 680i1333≥ 120Probably Q9650Probably all
Worked: X5450, E5450 (E0), E5420
EVGA nForce 780i SLInForce 780i1333≥ 136Q9650, QX9770All
Worked: X5460, X5470
Jump to the bottom or top of this list.
Foxconn
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Foxconn G31MG31 / ICH71333≥ 105Q9650, Q6700, Q6600 (all steppings)All
Worked: E5450 (SLANQ)
Foxconn G31MX-KG31 / ICH71333≥ 105Q9650, Q6700, E8600, E6850All
Worked: E5450
Foxconn G31MXPG31 / ICH71333≥ 130Q9650All
Not tested yet
Foxconn G41MXEG41 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450 (SLBBM)
Foxconn G41MXF (rev 2.0)G41 / ICH71333≥ 95Q9650All
Worked: E5420
Foxconn G41MXPG41 / ICH71333≥ 120Q9650, Q6700, E8600, E6850All
Worked: X5450
Foxconn G41S-KG41 / ICH7133365Q9550SAll
Not tested yet
Foxconn MCP73M01H1 (Napa-GL8E)GeForce 7100 / nForce 630i≥ 1333≥ 95Q9650 (reported working), E8xxx, E6850All
Not tested yet

Notes:
  • Used in HP Pavilion a6600f
Foxconn MCP73S01GeForce 7100 / nForce 630i1333≥ 120Q9650All
Worked: X5460 (E0)
Foxconn mcp7am01p8-1.0-8eksh1333≥ 95Q9650Probably all
Worked: E5440, E5430

Notes:
  • Didn't need Xeon microcode update
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Foxconn p35a-sP35 / ICH9R1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450 (E0)
Foxconn P35AX-SP35 / ICH91333≥ 130Q9650, QX9650All
Worked: E5405
Foxconn P43AP43 / ICH101333≥ 130Q9550, Q6700, E8600, E6850, QX9650All
Worked: E5160

Notes:
  • Didn't need Xeon microcode
Foxconn P45A-SP45 / ICH10R1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450
Jump to the bottom or top of this list.
Fujitsu
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Fujitsu D2841-A1G41≥ 1333≥ 80Probably Q9650Probably all
Worked: E5405
Fujitsu Esprimo E3521G41≥ 1333≥ 80Q9550Probably all
Worked: E5450
Jump to the bottom or top of this list.
Gigabyte
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte 965GM-S2G965 / ICH81066≥ 130Q6700, Q6600 (all steppings), QX6800At least all 65nm Xeons with a 1066 FSB
Worked: L5320
Gigabyte 965P-DQ6 (rev 3.3)P965 / ICH8R1333≥ 136Q9650 (non official), QX9650 (non official)All
Worked: X5355
Gigabyte 965P-DS3 (rev 3.3)P965 / ICH81333≥ 130Q9650 (unofficial), QX9650 (unofficial)All
Worked: E5450, X5460, X5260
Gigabyte 965P-DS3P (rev 1.3 & 3.3)P965 / ICH8R1333≥ 130Q9650 (unofficial), QX9650 (unofficial)All
Worked: E5420, X5460
Gigabyte 965P-DS4 (rev 1)P965 / ICH8R1333≥ 130Q9650, Q6700, QX6800All
Worked: X5460 (E0), E5450 (E0)

Notes:
  • Only 1066 FSB is officially supported, but multiple people have run 1333 without any problems
  • Only 65nm quads are officially supported, but 45nm quads have been reported to work
Gigabyte 965P-S3 (rev 3.3)P965 / ICH81333≥ 130Q9650 (unofficial), QX9650 (unofficial)65nm quads (officially), but probably also 45nm quads (unofficially)
Worked: E5440 (C0), X5260 (3.33 ghz dual core)
Gigabyte EG31MF-S2G31 / ICH71333≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: X5460
Gigabyte EG41MF-US2HG41 / ICH71333≥ 135q9650, QX9770All
Worked: E5450, L5430
Gigabyte EG45M-DS2HG45 / ICH10R1333≥ 150q9650, QX9770All
Worked: X5450, X5492
Gigabyte EP31-DS3LP31 / ICH71333≥ 135q9650, QX9770All
Worked: E5450
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte EP35-DS3P35 / ICH91333≥ 135Q9650, QX9770 (with overclock)All
Worked: X5460 (E0), E5450
Gigabyte EP35-DS3LP35 / ICH91333≥ 135q9650, QX9770 (with overclock)All
Worked: E5450 (SLBBM)
Gigabyte EP35-DS4P35 / ICH9R1333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: L5430
Gigabyte EP35C-DS3RP35 / ICH9R1333≥ 136q9650, QX9770 (with overclock)All
Worked: E5450
Gigabyte EP41-UD3L (rev 1)G41 / ICH71333≥ 136Q9650, QX9770All
Worked: X5460 (E0)
Gigabyte EP41T-USB3G41 / ICH71333≥ 130Q9650, QX9650All
Worked: X5450
Gigabyte EP43-DS3P43 / ICH101333≥ 135Q9650, QX9770All
Worked: E5450 (C0), E5440, E5430
Gigabyte EP43-DS3LP43 / ICH101333≥ 135Q9650, QX9770All
Worked: L5420
Gigabyte EP43-S3LP43 / ICH101333≥ 136Q9650, QX9770All
Worked: E5410
Gigabyte EP43-UD3LP43 / ICH101333≥ 135Q9650, QX9770All
Worked: X5460
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte EP43T-S3LP43 / ICH101333≥ 135Q9650, QX9770All
Worked: E5450
Gigabyte EP43T-UD3LP43 / ICH101333≥ 135Q9650, QX9770All
Worked: X5460 (E0), E5450
Gigabyte EP45-DS3P45 / ICH101600≥ 135Q9650, QX9770All
Worked: X5470
Gigabyte EP45-DS3LP45 / ICH101600≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: L5420
Gigabyte EP45-DS3PP45 / ICH10R1600≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: E5450
Gigabyte EP45-DS4P45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450 (E0), E5472
Gigabyte EP45-UD3LP45 / ICH101600≥ 150Q9650, QX9770All
Worked: X5460, X5492, E5420, E5410, E5405
Gigabyte EP45-UD3PP45 / ICH10R1600≥ 150Q9650, QX9770All
Worked: X5492, X5470, X5460 (E0), E5450, E5440, L5240, X3353
Gigabyte EP45C-DS3P45 / ICH101600≥ 135Q9650, QX9770All
Worked: E5450
Gigabyte EP45C-DS3RP45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450, L5430
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte EP45C-UD3RP45 / ICH10R1600150Q9650, QX9770All
Worked: X5492 (overclocked to 4 GHz)
Gigabyte EP45T-DS3RP45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450, X5460
Gigabyte EP45T-EXTREMEP45 / ICH10R1600≥ 136Q9650, QX9770All
Not tested yet
Gigabyte EP45T-UD3LRP45 / ICH10R1600≥ 150Q9650, QX9770All
Worked: X5492, X5460, E5430, E5462 (E0), L5430
Gigabyte EP45T-UD3RP45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450
Gigabyte EP45T-USB3PP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: X5470, X5460
Gigabyte EX38-DQ6X38 / ICH9R1600≥ 135Q9650, QX9770Supports all 3xxx series Xeons (the 5xxx series is incompatible).
Worked: X3363

FAILED: E5440
Gigabyte G31M-ES2C (rev 1)G31 / ICH71333≥ 130Q9650, QX9650All
Worked: E5440 (C0)
Gigabyte G31M-S2LG31 / ICH71333≥ 130Q9650, QX9650All
Worked: X5460, E5335, L5430, E5405, E5310
Gigabyte G41M-ES2HG41 / ICH71333≥ 95Q9650All
Worked: E5420
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte G41M-ES2LG41 / ICH71333≥ 95Q9650, Q6700, Q6600 (95W only)All
Worked: E5450
Gigabyte G41MT-D3G41 / ICH71333≥ 95Q9650, Q6700, Q6600 (95W only)All
Worked: L5430
Gigabyte G41MT-ES2LG41 / ICH71333≥ 95Q9650, Q6700, Q6600 (95W only)All
Worked: X3353
Gigabyte G41MT-S2P (rev 1.3)G41 / ICH71333≥ 95Q9650All
Worked: E5430
Gigabyte G41MT-S2PTG41 / ICH71333≥ 120Q9650, Q6700, E8600, E6850All
Worked: X5460 (C0)
Gigabyte GA-73PVM-S2HGeforce 7300 / nForce 630i≥ 1333≥ 130Q9650, Q6700, E8600, E6850, QX9650All
Worked: X5450, E5440, X3363
Gigabyte ga-945gcm-s2l945GC / ICH71066Only supports older Core 2 Duos (no quad core)May not be compatible with this MOD.
Not tested yet
Gigabyte GA-E7AUM-DS2H (rev 1.0)GeForce 9400M≥ 1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: X5470, L5410 (SLAP4)
Gigabyte GA-EP35-DS3RP35 / ICH9R1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450 (E0)
Gigabyte GA-EP45-UD3LRP45 / ICH10R1600≥ 136Q9650, QX9770All
Worked: E5420
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte GA-EP45-UD3RP45 / ICH10R1600150Q9650, QX9770All
Worked: X5492, X5482 (E0), X5460 (C0), L5420
Gigabyte GA-EQ45M-S2 (rev 1.0)Q45 / ICH10DO≥ 1333≥ 136Q9650, QX9770, Q6700, E8600, E6850All 3xxx series Xeons. The 5xxx series Xeons are probably incompatible.
Not tested yet
Gigabyte GA-G31M-ES2LG31 / ICH71333≥ 130Q9650, QX9650All
Worked: X5460 (E0), E5462, E5450 (C0), E5405 (E0)
Gigabyte GA-G33M-DS2RG33 / ICH9R1333≥ 136QX9770, Q9650, Q6700, E8600, E6850All
Worked: E5472, L5420

Notes:
  • Needed Xeon microcode update to run Win 8.1 & 10 64bit
Gigabyte GA-G33M-s2G33 / ICH91333≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: L5430
Gigabyte GA-G41M-ComboG41 / ICH71333≥ 120Q9650All
Worked: X5460, X5450 (E0), E5440 (C0), E5420 (E0), E5410 (E0), E5405, X3323
Gigabyte GA-P31-DS3LP31 / ICH71333≥ 130Q9650, QX9650All
Worked: X5460, X5260
Gigabyte GA-P31-S3GP31 / ICH71333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: X5470
Gigabyte GA-P35-DS3P35 / ICH91333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: E5450 (E0), E5440 (E0)
Gigabyte GA-P35-DS3PP35 / ICH9R1333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450 (E0, C0)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte P31-ES3GP31 / ICH71333≥ 130Q9650, QX9650All
Worked: E5450
Gigabyte P35-DQ6P35 / ICH9R1333≥ 130Q9650, QX9650All
Worked: E5450 (C0)
Gigabyte P35-DS3LP35 / ICH91333≥ 135Q9650, QX9770All
Worked: X5460 (C0), E5440, L5410
Gigabyte P35-DS3RP35 / ICH9R1333≥ 135Q9650, QX9770All
Worked: E5440, E5420, E5405
Gigabyte P35-DS4 (rev 2.1 verified, rev 1.0 should work)P35 / ICH9R1333≥ 135Q9650, QX9770All
Worked: E5440, L5420
Gigabyte P35-S3GP35 / ICH91333≥ 135Q9650, QX9650, Q6700, E8600, E6850All
Worked: E5450, E5410
Gigabyte P35C-DS3RP35 / ICH9R1333≥ 130Q9650, QX9650All
Worked: E5440 (E0), L5240
Gigabyte P41-ES3GG41 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All
Worked: X5260 (3.33 ghz dual core)
Gigabyte P43-ES3GP43 / ICH101333≥ 135Q9650, QX9770All
Worked: X5470, X5460 (C0), E5430
Gigabyte P43T-ES3G (rev 1.3 verified, rev 1.0 should work)P43 / ICH101333≥ 135q9650, QX9770All
Worked: E5462
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Gigabyte P45T-ES3GP45 / ICH101600≥ 120Q9650, Q6700, Q6600 (95W only), E8600, E6850All
Worked: X5460 (C0)
Gigabyte X38T-DQ6X38 / ICH9R1600≥ 135Q9650, QX9770All 3xxx series Xeons (the 5xxx series is incompatible)
Worked: X3363
Jump to the bottom or top of this list.
HP
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
HP Compaq 8000 Elite Mid towerQ4595Q9650, E8600May not be compatible with this mod.
FAILED: X3363

Notes:
  • Did not boot at all (black screen)
  • CPU worked in another motherboard
  • Xeon microcode bios mod didn't help
HP DX2400G33 / ICH9R≥ 1333≥ 120Q9650All
Worked: X5450, E5440
HP IPIBL-LB (Benicia)G33 / ICH91333≥ 95Probably Q9650All
Worked: E5450, L5420 (E0, C0)

Notes:
  • Needed Xeon microcode update
  • Used in: HP Pavillion Media Center m8430f, HP DX2400, HP Elite Pavilion M94245F
HP Pavilion p6110y (Asus IP-IBL motherboard)G33≥ 1333≥ 95Q9550 (C0)Probably all
Worked: E5450 (C0)

Notes:
  • Couldn't find cpu support list, so not sure if E0 stepping is supported
HP Pro 3000 MTG45S / ICH10R1333≥ 95Q9650, E8600All 45nm Xeons
Worked: E5410
HP xw4600X38 / ICH9R1333≥ 95Q9650, E860045nm 3xxx series Xeons
FAILED: E5430 (C0)

Notes:
  • 1 person reported a 5xxx series Xeon (E5440) worked even though the chipset is x38, but someone else reported an E5430 didn't work, so I'd assume the 5xxx series doesn't work until we hear more.
  • Don't see 65nm CPUs in the CPU support list, so those may not be supported.
Jump to the bottom or top of this list.
Intel
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Intel DG31PRG31 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450
Intel DG33FBCG33 / ICH9DH≥ 133395Q9650, Q6600 (95w only)Does not support 5xxx series Xeons (not sure about the 3xxx series)
FAILED: E5450, Two X5460

Notes:
  • Didn't work for 2 different people.
  • With the X5460, the Xeons and adapter worked in another motherboard.
  • Classic Series Model
  • Supports Intel Viiv Technology
Intel DG33M04G33 / ICH91333≥ 95Q9650, Q6700All
Worked: E5450
Intel DG33TLG33 / ICH9R≥ 1333≥ 105Q9650, Q6600 (G0 & B3 steppings)May not support 5xxx series Xeons (not sure about the 3xxx series)
FAILED: X5450, E5450

Notes:
  • Same person tried an X5450 and E5450
  • Media Series Model
  • Supports Intel Viiv Technology
Intel DG35ECG35 / ICH8≥ 1333≥ 95Q9650Motherboard may not be compatible with this MOD.
FAILED: X3353 (but did work in another motherboard)
Intel DG41MJG41 / ICH7≥ 133365Q9550SAll
Worked: L5430
Intel DG41RQG41 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All 1333 FSB Xeons
Worked: E5450 (E0), E5420 (E0), E5410 (E0), X3353

FAILED: E5472
Intel DG41TXG41 / ICH7133395Q9650, Q6700All
Worked: E5450
Intel DG41TY (AA Revision 203)G41 / ICH7133395Q9650, Q6700, E8600, E6850All
Worked: E5430 (C0)

Notes:
  • E0 stepping Xeons (on this motherboard) lack support for some features by default (like Speedstep, SSE 4.1, and VT-X)
  • C0 and older steppings don't have this problem
  • Xeon microcode update will likely fix this, but it's hard to do on an Intel board
Intel DG41WVG411333≥ 120Q9650, E8600All 45nm Xeons
Worked: X5460

Notes:
  • 65nm CPUs aren't in cpu support list.
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Intel DG45FCG45 / ICH10R133365Q9550S, E8500, E6850All
Worked: E5450 (E0)

Notes:
  • 80W E5450 worked even though the max TDP is 65 W
  • System won't boot on a restart or reset, but it does boot normally if you shutdown first.
Intel DG45ID (AA#310)G45 / ICH10R≥ 133395Q9650All
Worked: E5450 (E0), L5248 (ES)

Notes:
  • Supports Intel ViiV technology
Intel DG965SSG9651066≥ 130See notesProbably all
Worked: E5310 (G0), E5320 (B3), L5408 (E0)

Notes:
  • Only officially supports dual cores, but Quad core reported to also work
  • 1333 FSB not supported
  • Xeons reported to only work with old BIOS versions (up to 1577)
  • Board won't boot with newer BIOS
Intel DP35DPP35 / ICH9R≥ 1333≥ 105Q9650, Q6600 (105W)May not support 5xxx series Xeons (not sure about the 3xxx series)
FAILED: E5450

Notes:
  • Only 1 person has tried it
  • Media Series Model
  • Supports Intel Viiv Technology
Intel DP43TFP43 / ICH10133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450 (C0)
Intel DP45SGP45 / ICH10R1333≥ 130Q9650, QX9650All
Worked: E5450, E5440 (E0), X5470 (E0)

Notes:
  • Can't install Windows 8.1 64-bit without a Xeon microcode update (which may not be possible on an Intel board)
Intel DQ35JOEQ351333105Q9650, Q6700, E8600, E6850May not be compatible with this mod
FAILED: X3363 (E0)
Intel DX38BTX38≥ 1333≥ 130Q9650, QX9650, Q6700, E8600, E6850Probably doesn't work with any LGA 771 Xeons
FAILED: X3353
Intel S3200SHIntel 3200/3210 / ICH9R1333≥ 130X3370 (E0), qx9650, q9550 (C1), q6600 (all tdps)May not be compatible with this mod.
FAILED: E5440

Notes:
  • Server motherboard
  • Someone else with an Intel motherboard with this chipset reported a 3xxx series also didn't work
Jump to the bottom or top of this list.
J & W
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
J & W JW-P45D2-UltraP45 / ICH10R1600≥ 95Probably Q9650Probably all
Worked: E5410 (c0 stepping)
Jump to the bottom or top of this list.
Jetway
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Jetway Xblue-P43-LP43 / ICH101600≥ 95 (probably 135)Q9650, QX9770 (out of spec), Q6700 (no Q6600 listed)All
Worked: L5420, E5205, E5110
Jump to the bottom or top of this list.
Lenovo
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Lenovo M58e Type: 7307-PV4G41≥ 1333≥ 95At least Q9550 (C0 stepping)All
Worked: E5450
Jump to the bottom or top of this list.
MSI
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
MSI 945P Neo5Only supports older 65nm core 2 duo.May not be compatible with this MOD.
Not tested yet
MSI G31M (MS-7379 version 2)G31 / ICH71333≥ 130Q9650, QX9650All
Not tested yet
MSI G31M3-L V2G31 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450, E5430, E3113, E5205
MSI G31TM-P21 (MSI 7529 v1.6)G31 / ICH71333≥ 120Q9650, Q6700, Q6600 (G0 only)All
Worked: X5470, E5450
MSI G31TM-P35G31 / ICH71333≥ 120Q9650, Q6700, Q6600 (95W only), E8600, E6850All
Worked: X5460 (C0), E5420 (E0)
MSI G41M-P23G41 / ICH7133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450
MSI G41M-P25G41 / ICH71333≥ 120Q9650, Q6700, Q6600 (G0 only), E8600, E6850All
Worked: E5450 (C0), X5460
MSI G41M-P26G41 / ICH7133395Q9650, Q6700, E8600, E6850All
Worked: E5462
MSI G41M-P33 ComboG41 / ICH71333≥ 120Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450, X5450
MSI G41M-P34 MS7592G41 / ICH7 / ICH7R1333≥ 95Q9550 (C0); Probably these: Q9650, Q6700, E8600, E6850Probably all
Worked: E5450 (C0)

Notes:
  • Couldn't find CPU support list, so not positive if E0 stepping is supported by default
  • Probably supports TDPs up to 130 W
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
MSI MEDION MS-7502 aka MS-7358G331333≥ 130QX9650, Q9650, Q6700, E8600, E6850All
Worked: E5450 (C0)
MSI MS-7525 (HP Boston)G311333?Core 2 Duo E7xxxDual core only
FAILED: L5430 (quad core)

Notes:
  • Someone said they had a hard time finding a BIOS that allowed regular 45nm dual core LGA 775 processors.
MSI P35 NeoP35 / ICH91333≥ 130Q9650, Q6700, E8600, E6850, QX9650All
Worked: E5472
MSI P35 NEO2-FRP35 / ICH9R1600≥ 136Q9650, QX9770All
Worked: X5470, E5420, L5420
MSI P35 PlatinumP35 / ICH9R1600≥ 136Q9650, QX9770All
Worked: E5450, X5460, X5450, L5420
MSI P41T-C31 MS 7610 (rev 1.0)G41 / ICH7≥ 1333≥ 95Q9650All
Worked: E5430 (C0)
MSI P43 NeoP43 / ICH101600≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: E5472
MSI P43-C51P43 / ICH101333≥ 136Q9650, QX9770All
Worked: X5460 (C0), E5420, L5420
MSI P45 NeoP45 / ICH101600≥ 135Q9650, QX9770All
Worked: E5450 (C0)
MSI P45 Neo-FP45 / ICH101600≥ 135Q9650, QX9770All
Worked: E5450 (SLBBM)
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
MSI P45 Neo2P45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450 (C0)
MSI P45 PlatinumP45 / ICH10R1600≥ 135Q9650, QX9770All
Worked: E5450, X5460

Notes:
  • Someone reported that they needed to add the Xeon microcode to the BIOS before the system would post.
MSI P45D3 Neo-FP45 / ICH101600≥ 135Q9650, QX9770All
Worked: E5462
MSI P6N DiamondnForce 680i SLI / 570i SLI MCP1333≥ 130QX6800, Q6700, E6850All 65nm
Not tested yet
MSI P6N SLInForce 650i SLI / 430i1333≥ 130Q6700, QX6850, E8600, E6850All 65nm CPUs. Dual core only for 45nm.
FAILED: E5450 (C0)

Notes:
  • 1 person reported that a 45nm E5450 was unstable (random crashes). Said they tried the things in the troubleshooting guide, and it didn't help.
MSI P6N SLI PlatinumnForce 650i SLI1333≥ 130Q6700, Q6600 (all steppings), QX6850Officially supports all 65nm quad core; 45nm quads are not officially supported, but someone reported an X5460 worked.
Worked: X5460 (C0), E5345 (SLAEJ)
MSI P7N DiamondnForce 780i SLI / 570i SLI1333≥ 136Q9650, QX9770, Q6700, E8600, E6850All
Worked: E5470
Jump to the bottom or top of this list.
Pegatron
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Pegatron IPIEL-LA3G43≥ 1333≥ 120Q9650May not be stable for some with this mod
Worked: X5470

FAILED: E5450 (E0; rev 1.02 board)

Notes:
  • Used in HP Slimline s5280t
  • 2 people reported the system was extremely slow (it may be due to c-states being enabled, but it's been reported there isn't an option to disable it from within the bios)
Pegatron IPM41-D3G41 / ICH71333≥ 95Q9650, Q6600, E8600 All
Not tested yet
Pegatron IPMEL-PRCG41 / ICH7133395Probably Q9650Probably all
Worked: E5405
Jump to the bottom or top of this list.
Shuttle
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Shuttle SG33G5G33 / ICH9DH1333≥ 95Q9650Probably all
Not tested yet
Shuttle SP35P2 (motherboard FP35)P35 / ICH9R≥ 1333≥ 130Q9650, QX9650, Q6700, E8600, E6850All
Worked: E5430, L5420
Shuttle XPC SG41J4G41 / ICH71333≥ 95Q9650, E8600, E6850 (65nm quad core Q6700 not supported)Probably all 45nm (dual and quad) and 65nm (dual core only) Xeons
Not tested yet
Jump to the bottom or top of this list.
Supermicro
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Supermicro X7SBEIntel 3210 / ICH9R≥ 1333≥ 95Q9650Probably all 3xxx series Xeons are supported.
Worked: X3363 (C0)

FAILED: X5450 (E0), E5450 (C0)

Notes:
  • Someone reported they couldn't overclock at all, but system seemed stable at stock speeds
  • Can't update microcode (even though it's a Phoenix BIOS)
  • CPU-Z doesn't show correct information for CPU (wrong voltage, etc..)
Jump to the bottom or top of this list.
XFX
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
XFX 680i ltnForce 680i LT SLI1333≥ 130Q6700, QX685065nm quads (officially), but reported to also work with 45nm quads.
Worked: E5450, X5460, X5450 (C0)

Notes:
  • 1 person reported an X5450 (C0) wouldn't boot until they flashed the P08 BIOS
XFX 780inForce 780i1333≥ 120Probably Q9650, probably QX9650Probably all
Worked: X5460
XFX 790inForce 790i Ultra1600≥ 136Q9650, QX9770All
Worked: X5470 (E0), E5450 (E0), E5440
XFX 9300GeForce 9300133395Q9650, Q6600 (95W only)All
Worked: L5420
XFX nForce 750inForce 750i1333≥ 130Q9650, Q9550S, QX9650, Q6700, E8600, E6850All
Worked: E5410, E5405
Jump to the bottom or top of this list.
Zotac
MotherboardChipsetMax FSB
(not overclocked)		Max TDPLGA 775 CPUs SupportedXeon Compatibility
(within FSB and TDP limits)
Zotac 620i (MCP73)nForce 620i1333≥ 120Q9650All
Worked: X5460
Zotac g43itx-a-eG43 / ICH10133365Q9550SAll
Worked: L5420 (E0, C0)
Zotac GF9300 ITXGeForce 9300133395Q9650, Q6700, Q6600 (G0 only)All
Worked: E5450, E5440
Table of Contents
  1. List of LGA 771 & 775 CPUs + Current Prices
  2. Where can I get an adapter?
  3. Why would you want to do this?
  4. How does the adapter work?
  5. Minor modification to the LGA 775 socket is also required
  6. Motherboard Compatibility
  7. Recommended LGA 771 Xeon processors
  8. Tested motherboards
  9. Detailed instructions for completing this MOD
  10. Troubleshooting Problems
Leave a comment

2,332 Responses

1 … 139 140 141
  • REPITLEXDD December 9, 20197:04 pm

    Dude, I bought The Kazuk LGA 775 motherboard, g41-B chipset, on my Xeon e5450 requirements is 99% likely to work, but does it really work?

    Reply
1 … 139 140 141

Leave a Comment

Problem with this MOD? Please read the troubleshooting section before reporting a problem. If that doesn't help, please tell us all of the things you've already tried.

Unsure about compatibility? Please read the motherboard compatibility and tested motherboards sections of this guide.