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Differences What are the advantages of each

Front view of Intel Xeon X5670

Reasons to consider the
Intel Xeon X5670

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Much higher clock speed 2.93 GHz vs 2 GHz More than 45% higher clock speed
Much higher turbo clock speed 3.33 GHz vs 2.27 GHz More than 45% higher turbo clock speed
Much better overclocked clock speed (Air) 4.29 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.5 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 77.19W vs 85.31W Around 10% lower typical power consumption
Lower annual commercial energy cost 83.22 $/year vs 91.98 $/year Around 10% lower annual commercial energy cost
Lower annual home energy cost 22.89 $/year vs 25.29 $/year Around 10% lower annual home energy cost
Front view of Intel Xeon E6540

Reasons to consider the
Intel Xeon E6540

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Much more l3 cache 18 MB vs 12 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core

Features Key features of the Xeon X5670  vs E6540 

clock speed

Xeon X5670
2.93 GHz
Xeon E6540
2 GHz

turbo clock speed

Xeon X5670
3.33 GHz
Xeon E6540
2.27 GHz

L2 cache

L3 cache

Xeon X5670
12 MB
Xeon E6540
18 MB

overclocked clock speed (air)

Xeon X5670
4.29 GHz
Xeon E6540
2 GHz

overclocked clock speed (water)

Xeon X5670
4.5 GHz
Xeon E6540
2 GHz

Specifications Full list of technical specs

summary

Xeon X5670  vs
E6540 
Clock speed 2.93 GHz 2 GHz
Turbo clock speed 3.33 GHz 2.27 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366
LGA 1567

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 105W
Annual home energy cost 22.89 $/year 25.29 $/year
Annual commercial energy cost 83.22 $/year 91.98 $/year
Typical power consumption 77.19W 85.31W

details

Xeon X5670  vs
E6540 
Threads 12 12
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.33 MB/core
L3 cache 12 MB 18 MB
L3 cache per core 2 MB/core 3 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 2

overclocking

Overclocked clock speed 4.29 GHz 2 GHz
Overclocked clock speed (Water) 4.5 GHz 2 GHz
Overclocked clock speed (Air) 4.29 GHz 2 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture QPI QPI
Number of links 2 4
Data rate 51,200 MB/s 102,400 MB/s
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz
Intel Xeon X5670
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Intel Xeon E6540
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