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.

CPUPrice
(Oct 28)Speed
& RatioL2 CacheFSBTDPNodeCodename
& SocketStepping
(sSpec)

• Xeon X5492

$863.40 GHz
8.5x2 x 6 MB1600150W45nm

• Harpertown
• LGA 771

E0(SLBBD)View Sellers

• Xeon X5470

Sold out3.33 GHz
10.0x2 x 6 MB1333120W45nm

• Harpertown
• LGA 771

E0(SLBBF)View Sellers~ 3.20 GHz

• Xeon X5460

$193.17 GHz
9.5x2 x 6 MB1333120W45nm

• Harpertown
• LGA 771

E0(SLBBA)
C0(SLANP)View Sellers

• Xeon X5482

$333.20 GHz
8.0x2 x 6 MB1600120W
150W45nm

• Harpertown
• LGA 771

E0(SLBBG)
C0(SLANZ)View Sellers

• Core 2 Extreme QX9770

$2493.20 GHz
8.0x2 x 6 MB1600136W45nm

• Yorkfield XE
• LGA 775

C1(SLAWM)
C0(SLAN2)View Sellers

• Core 2 Extreme QX9775

$5003.20 GHz
8.0x2 x 6 MB1600150W45nm

• Yorkfield XE
• LGA 771

C0(SLANY)View Sellers

• Xeon X3380

Sold out3.17 GHz
9.5x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLGPG)View Sellers~ 3.00 GHz

• Xeon E5450

$63.00 GHz
9.0x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBM)
C0(SLANQ)View Sellers

• Xeon E5472

$93.00 GHz
7.5x2 x 6 MB160080W45nm

• Harpertown
• LGA 771

E0(SLBBH)
C0(SLANR)View Sellers

• Xeon X5450

$103.00 GHz
9.0x2 x 6 MB1333120W45nm

• Harpertown
• LGA 771

E0(SLBBE)
C0(SLASB)View Sellers

• Xeon X5472

$143.00 GHz
7.5x2 x 6 MB1600120W45nm

• Harpertown
• LGA 771

E0(SLBBB)
C0(SLASA)View Sellers

• Core 2 Extreme QX6850

$423.00 GHz
9.0x2 x 4 MB1333130W65nm

• Kentsfield XE
• LGA 775

G0(SLAFN)View Sellers

• Xeon X3370

$463.00 GHz
9.0x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLB8Z)View Sellers

• Core 2 Extreme QX6800

$692.93 GHz
11.0x2 x 4 MB1066130W65nm

• Kentsfield XE
• LGA 775

G0(SLACP)
B3(SL9UK)View Sellers

• Core 2 Extreme QX9650

$793.00 GHz
9.0x2 x 6 MB1333130W45nm

• Yorkfield XE
• LGA 775

C1(SLAWN)
C0(SLAN3)View Sellers

• Xeon X5365

Sold out3.00 GHz
9.0x2 x 4 MB1333150W65nm

• Clovertown
• LGA 771

G0(SLAED)
B3(SLAC3)View Sellers

• Core 2 Quad Q9650

Sold out3.00 GHz
9.0x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLB8W)View Sellers~ 2.83 GHz

• Xeon E5440

$62.83 GHz
8.5x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBJ)
C0(SLANS)View Sellers

• Xeon E5462

$72.80 GHz
7.0x2 x 6 MB160080W45nm

• Harpertown
• LGA 771

E0(SLBBN)
C0(SLANT)View Sellers

• Xeon X3363

$162.83 GHz
8.5x2 x 6 MB133380W45nm

• Yorkfield-CL
• LGA 771

E0(SLBC3)
C0(SLASC)View Sellers

• Core 2 Quad Q9550S

$452.83 GHz
8.5x2 x 6 MB133365W45nm

• Yorkfield
• LGA 775

E0(SLGAE)View Sellers

• Core 2 Quad Q9505S

$472.83 GHz
8.5x2 x 3 MB133365W45nm

• Yorkfield-6M
• LGA 775

R0(SLGYZ)View Sellers

• Xeon L3360

$502.83 GHz
8.5x2 x 6 MB133365W45nm

• Yorkfield
• LGA 775

E0(SLGPF)View Sellers

• Xeon X3360

Sold out2.83 GHz
8.5x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLB8X)
C1(SLAWZ)
C0(SLAN5)View Sellers

• Core 2 Quad Q9550

Sold out2.83 GHz
8.5x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLB8V)
C1(SLAWQ)
C0(SLAN4)View Sellers

• Core 2 Quad Q9505

Sold out2.83 GHz
8.5x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLGYY)View Sellers

• Core 2 Quad Q9500

Sold out2.83 GHz
8.5x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLGZ4)View Sellers2.67 GHz

• Xeon E5430

$52.67 GHz
8.0x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBK)
C0(SLANU)View Sellers

• Core 2 Quad Q8400

$62.67 GHz
8.0x2 x 2 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLGT6)View Sellers

• Xeon X5355

$72.67 GHz
8.0x2 x 4 MB1333120W65nm

• Clovertown
• LGA 771

G0(SLAEG)
B3(SLAC4)
B3(SL9YM)View Sellers

• Core 2 Quad Q9400

$92.67 GHz
8.0x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLB6B)View Sellers

• Xeon X3353

$122.67 GHz
8.0x2 x 6 MB133380W45nm

• Yorkfield-CL
• LGA 771

E0(SLBC4)
C0(SLASD)View Sellers

• Core 2 Quad Q9450

$122.67 GHz
8.0x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

C1(SLAWR)
C0(SLAN6)View Sellers

• Core 2 Quad Q6700

$132.67 GHz
10.0x2 x 4 MB106695W65nm

• Kentsfield
• LGA 775

G0(SLACQ)View Sellers

• Xeon X3330

$132.67 GHz
8.0x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLB6C)View Sellers

• Xeon X3230

$172.67 GHz
10.0x2 x 4 MB106695W65nm

• Kentsfield
• LGA 775

G0(SLACS)View Sellers

• Xeon L5430

$172.67 GHz
8.0x2 x 6 MB133350W45nm

• Harpertown
• LGA 771

E0(SLBBQ)View Sellers

• Xeon X3350

$202.67 GHz
8.0x2 x 6 MB133395W45nm

• Yorkfield
• LGA 775

E0(SLB8Y)
C1(SLAX2)
C0(SLAN7)View Sellers

• Core 2 Quad Q8400S

$202.67 GHz
8.0x2 x 2 MB133365W45nm

• Yorkfield-6M
• LGA 775

R0(SLGT7)View Sellers

• Core 2 Extreme QX6700

$212.67 GHz
10.0x2 x 4 MB1066130W65nm

• Kentsfield XE
• LGA 775

B3(SL9UL)View Sellers

• Core 2 Quad Q9400S

$302.67 GHz
8.0x2 x 3 MB133365W45nm

• Yorkfield-6M
• LGA 775

R0(SLG9U)View Sellers

• Core 2 Quad Q9450S

$412.67 GHz
8.0x2 x 6 MB133365W45nm

• Yorkfield
• LGA 775

C1(SLAWY)View Sellers2.50 GHz

• Xeon E5420

$62.50 GHz
7.5x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBL)
C0(SLANV)View Sellers

• Core 2 Quad Q8300

$72.50 GHz
7.5x2 x 2 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLGUR)
R0(SLB5W)View Sellers

• Xeon X3323

$82.50 GHz
7.5x2 x 3 MB133380W45nm

• Yorkfield-CL
• LGA 771

R0(SLBC5)
M0(SLASE)View Sellers

• Xeon L5420

$82.50 GHz
7.5x2 x 6 MB133350W45nm

• Harpertown
• LGA 771

E0(SLBBR)
C0(SLARP)View Sellers

• Core 2 Quad Q9300

$92.50 GHz
7.5x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

M1(SLAWE)
M0(SLAMX)View Sellers

• Xeon X3320

$112.50 GHz
7.5x2 x 3 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLB69)
M1(SLAWF)View Sellers~ 2.40 GHz

• Xeon E5410

$52.33 GHz
7.0x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBC)
C0(SLANW)View Sellers

• Xeon L5410

$52.33 GHz
7.0x2 x 6 MB133350W45nm

• Harpertown
• LGA 771

E0(SLBBS)
C0(SLAP4)View Sellers

• Xeon E5345

$52.33 GHz
7.0x2 x 4 MB133380W65nm

• Clovertown
• LGA 771

G0(SLAEJ)
B3(SLAC5)
B3(SL9YL)View Sellers

• Core 2 Quad Q8200

$62.33 GHz
7.0x2 x 2 MB133395W45nm

• Yorkfield-6M
• LGA 775

R0(SLG9S)
M1(SLB5M)View Sellers

• Core 2 Quad Q6600

$82.40 GHz
9.0x2 x 4 MB106695W
105W65nm

• Kentsfield
• LGA 775

G0(SLACR)
B3(SL9UM)View Sellers

• Xeon X3220

$82.40 GHz
9.0x2 x 4 MB1066105W65nm

• Kentsfield
• LGA 775

G0(SLACT)
B3(SL9UP)View Sellers

• Core 2 Quad Q8200S

$162.33 GHz
7.0x2 x 2 MB133365W45nm

• Yorkfield-6M
• LGA 775

R0(SLGSS)
R0(SLG9T)View Sellers2.13 GHz

• Xeon X3210

$92.13 GHz
8.0x2 x 4 MB1066105W65nm

• Kentsfield
• LGA 775

G0(SLACU)
B3(SL9UQ)View Sellers

• Xeon L5408

$102.13 GHz
8.0x2 x 6 MB106640W45nm

• Harpertown
• LGA 771

E0(SLBBT)
C0(SLAP5)View Sellers

• Core 2 Quad Q6400

Sold out2.13 GHz
8.0x2 x 4 MB1066105W65nm

• Kentsfield
• LGA 775

B3(SL9UN)View Sellers2.00 GHz

• Xeon E5335

$42.00 GHz
6.0x2 x 4 MB133380W65nm

• Clovertown
• LGA 771

G0(SLAEK)
B3(SLAC7)
B3(SL9YK)View Sellers

• Xeon E5405

$52.00 GHz
6.0x2 x 6 MB133380W45nm

• Harpertown
• LGA 771

E0(SLBBP)
C0(SLAP2)View Sellers

• Xeon L5335

$192.00 GHz
6.0x2 x 4 MB133350W65nm

• Clovertown
• LGA 771

G0(SLAEN)View Sellers1.87 GHz

• Xeon L5320

$51.87 GHz
7.0x2 x 4 MB106650W65nm

• Clovertown
• LGA 771

G0(SLAEP)
B3(SLAC9)
B3(SLA4Q)View Sellers

• Xeon E5320

$51.87 GHz
7.0x2 x 4 MB106680W65nm

• Clovertown
• LGA 771

G0(SLAEL)
B3(SLAC8)
B3(SL9MV)View Sellers1.60 GHz

• Xeon E5310

$51.60 GHz
6.0x2 x 4 MB106680W65nm

• Clovertown
• LGA 771

G0(SLAEM)
B3(SLACB)
B3(SL9XR)View Sellers

• Xeon L5310

$51.60 GHz
6.0x2 x 4 MB106650W65nm

• Clovertown
• LGA 771

G0(SLAEQ)
B3(SLACA)
B3(SL9MT)View Sellers

• Xeon L5318

Sold out1.60 GHz
6.0x2 x 4 MB106640W65nm

• Clovertown
• LGA 771

G0(SLAJE)View Sellers

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.

HarpertownYorkfield-CLYorkfield XEYorkfieldYorkfield-6MCPUs
(where x = any digit)Xeon X54xx, E54xx, L54xxXeon X33x3Core 2 Extreme QX9xxx

• Core 2 Quad Q9x50
• Xeon X33x0, L33x0

• Core 2 Quad Q9x0x, Q8xxx
• Xeon X3330, X3320

SocketLGA 771LGA 771

• LGA 771
• LGA 775

LGA 775LGA 775MicroarchitecturePenrynPenrynPenrynPenrynPenrynL2 Cache2 × 6 MB

• 2 × 6 MB
• 2 × 3 MB

2 × 6 MB2 × 6 MB

• Q8xxx:
  2 × 2 MB
• All others:
  2 × 3 MB

Unlocked ratio (multiplier)SSE4.1Virtualization 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 Size2 × 107 mm2

• 2 × 107 mm2
• X3323:
  2 × 82 mm2

2 × 107 mm22 × 107 mm22 × 82 mm2Voltage0.851.35 V0.851.35 V0.851.36 V0.851.36 V0.851.36 V

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

65nm Comparison

ClovertownKentsfield XEKentsfieldCPUs
(where x = any digit)Xeon X53xx, E53xx, L53xxCore 2 Extreme QX6xxx

• Core 2 Quad Q6xxx
• Xeon X32xx

SocketLGA 771LGA 775LGA 775MicroarchitectureCoreCoreCoreL2 Cache2 × 4 MB2 × 4 MB2 × 4 MBUnlocked ratio (multiplier)SSE4.1Virtualization 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 ConfigurationsDie Size2 × 143 mm22 × 143 mm22 × 143 mm2Voltage

• L53xx[a]:
  1.101.25 V
• All others:
  1.001.50 V

1.11.37 V

• Core 2 Quad:
• 1.11.37 V
• Xeon:
• 0.851.5 V

• a Clovertown voltage range exceptions: Xeon L5335 is 1.001.50 V and L5318 is 0.901.25 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.

SteppingNodeReleasedL2 CacheCPUsCPUIDE045nmAugust 20082 x 6 MB

• Harpertown
• Yorkfield-CL
• Yorkfield

1067AC145nmMarch 20082 x 6 MB

• Yorkfield
• Yorkfield XE

10677C045nmNovember 20072 x 6 MB

• Harpertown
• Yorkfield-CL
• Yorkfield
• Yorkfield XE

10676R045nmAugust 2008

• 2 x 3 MB

• Yorkfield-CL
• Yorkfield-6M

1067AM145nmMarch 2008

• 2 x 3 MB
• 2 x 2 MB

Yorkfield-6M10677M045nmMarch 20082 x 3 MB

• Yorkfield-CL
• Yorkfield-6M

10676G065nmApril 20072 x 4 MB

• Clovertown
• Kentsfield XE
• Kentsfield

06FBB365nmNovember 20062 x 4 MB

• Clovertown
• Kentsfield XE
• Kentsfield

06F7