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Differences What are the advantages of each

Front view of Intel Xeon E5640

Reasons to consider the
Intel Xeon E5640

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 4 vs 2 Twice as many cores; run more applications at once
Much lower typical power consumption 65W vs 134.06W 2.1x lower typical power consumption
Much better overclocked clock speed (Air) 4.24 GHz vs 3 GHz More than 40% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.41 GHz vs 3 GHz More than 45% better overclocked clock speed (Water)
Much lower annual commercial energy cost 70.08 $/year vs 144.54 $/year 2.1x lower annual commercial energy cost
Much lower annual home energy cost 19.27 $/year vs 39.75 $/year 2.1x lower annual home energy cost
Newer Mar, 2010 vs Nov, 2005 Release date over 4 years later
Front view of Intel Xeon 7041

Reasons to consider the
Intel Xeon 7041

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 2.66 GHz Around 15% higher clock speed
Supports more CPUs in SMP configuration 32 vs 2 30 supports more CPUs in SMP configuration
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core

Features Key features of the Xeon E5640  vs 7041 

clock speed

Xeon E5640
2.66 GHz
Xeon 7041
3 GHz

L2 cache

Xeon E5640
1 MB
Xeon 7041
4 MB

overclocked clock speed (air)

Xeon E5640
4.24 GHz
Xeon 7041
3 GHz

overclocked clock speed (water)

Xeon E5640
4.41 GHz
Xeon 7041
3 GHz

TDP

Specifications Full list of technical specs

summary

Xeon E5640  vs
7041 
Clock speed 2.66 GHz 3 GHz
Cores Quad core Dual core
Socket type
LGA 1366
604

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
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 80W 165W
Annual home energy cost 19.27 $/year 39.75 $/year
Annual commercial energy cost 70.08 $/year 144.54 $/year
Typical power consumption 65W 134.06W

bus

Architecture QPI FSB
Number of links 2 1
Clock speed 2,930 MHz 800 MHz

details

Xeon E5640  vs
7041 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 2 MB/core
Manufacture process 32 nm 90 nm
Max CPUs 2 32
Clock multiplier 20 15
Voltage range 0.75 - 1.35V 1.26 - 1.41V
Operating temperature Unknown - 77.6°C Unknown - 76°C

overclocking

Overclocked clock speed 4.24 GHz 3 GHz
Overclocked clock speed (Water) 4.41 GHz 3 GHz
Overclocked clock speed (Air) 4.24 GHz 3 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
Intel Xeon E5640
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Intel Xeon 7041
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