List of LGA 771 & 775 CPUs + Current Prices

On this page, we've combined all of Intel's quad core LGA 771 and LGA 775 CPUs into 1 table (sorted by speed). This should make it easier to compare prices and specifications if you're considering the LGA 771 to 775 MOD.

• Intel Core 2 Quad
• Intel Core 2 Extreme
• LGA 771 Xeon
• LGA 775 Xeon

List of Quad Core LGA 771 & 775 CPUs

Note: The prices and links shown below are for eBay. All prices are current and are automatically updated throughout the day.

Key features and differences between Quad Core LGA 771 & 775 CPUs

The CPUs shown below are grouped by codename, since most CPUs with the same codename are very similar. You can find the codename for each processor in the main CPU table.

45nm Comparison

The most important thing to notice is that the Yorkfield-6M CPUs (LGA 775) have half the cache of the others.

	Harpertown	Yorkfield-CL	Yorkfield XE	Yorkfield	Yorkfield-6M
CPUs (where x = any digit)	Xeon X54xx, E54xx, L54xx	Xeon X33x3	Core 2 Extreme QX9xxx	Core 2 Quad Q9x50   Xeon X33x0, L33x0	Core 2 Quad Q9x0x, Q8xxx   Xeon X3330, X3320
Socket	LGA 771	LGA 771	LGA 771 LGA 775	LGA 775	LGA 775
Microarchitecture	Penryn	Penryn	Penryn	Penryn	Penryn
L2 Cache	2 × 6 MB	2 × 6 MB 2 × 3 MB	2 × 6 MB	2 × 6 MB	Q8xxx: 2 × 2 MB   All others: 2 × 3 MB
Unlocked ratio (multiplier)
SSE4.1
Virtualization Technology (VT-x)					All (except Q8200)[a]
Virtualization Technology for Directed I/O (VT-d)				All (except Xeons)	All (except Q9500, Q8xxx, Xeons)
Enhanced Intel SpeedStep Technology (EIST)	All (except E5405)
Demand Based Switching	All (except E5405, L5408)
Trusted Execution Technology (TXT)				All (except Xeons)	All (except Q9500, Q8xxx, Xeons)
Dual CPU Configurations			QX9775 All others
Die Size	2 × 107 mm2	2 × 107 mm2   X3323: 2 × 82 mm2	2 × 107 mm2	2 × 107 mm2	2 × 82 mm2
Voltage	0.85–1.35 V	0.85–1.35 V	0.85–1.36 V	0.85–1.36 V	0.85–1.36 V

• ^a Note: Some revisions of the Q8200S and Q8300 also do not support VT-x (see notes in the CPU table).

65nm Comparison

	Clovertown	Kentsfield XE	Kentsfield
CPUs (where x = any digit)	Xeon X53xx, E53xx, L53xx	Core 2 Extreme QX6xxx	Core 2 Quad Q6xxx   Xeon X32xx
Socket	LGA 771	LGA 775	LGA 775
Microarchitecture	Core	Core	Core
L2 Cache	2 × 4 MB	2 × 4 MB	2 × 4 MB
Unlocked ratio (multiplier)
SSE4.1
Virtualization Technology (VT-x)
Virtualization Technology for Directed I/O (VT-d)
Enhanced Intel SpeedStep Technology (EIST)	All (except E5310 & E5335)
Demand Based Switching	X53xx, E5345, E5320, L5318   All others
Trusted Execution Technology (TXT)
Dual CPU Configurations
Die Size	2 × 143 mm2	2 × 143 mm2	2 × 143 mm2
Voltage	L53xx[a]: 1.10–1.25 V   All others: 1.00–1.50 V	1.1–1.37 V	Core 2 Quad: 1.1–1.37 V   Xeon: 0.85–1.5 V

• ^a Clovertown voltage range exceptions: Xeon L5335 is 1.00–1.50 V and L5318 is 0.90–1.25 V.

CPU Steppings (revisions) & CPUID Information

If you're unsure what a stepping is, Intel basically creates a new stepping (or revision) whenever they make a major change to a processor. This usually fixes bugs, adds new features, reduces power consumption, or improves overclocking.