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Differences What are the advantages of each

Front view of Intel Xeon 7040

Reasons to consider the
Intel Xeon 7040

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Supports more CPUs in SMP configuration 32 vs 1 31 supports more CPUs in SMP configuration
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
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Higher clock speed 3 GHz vs 2.66 GHz Around 15% higher clock speed
Higher Maximum operating temperature 76 °C vs 67.9 °C More than 10% higher Maximum operating temperature
Significantly lower annual home energy cost 39.75 $/year vs 48.38 $/year Around 20% lower annual home energy cost
Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better overclocked clock speed (Air) 4.22 GHz vs 3 GHz More than 40% better overclocked clock speed (Air)
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 8 vs 4 Twice as many threads
Newer Oct, 2008 vs Nov, 2005 Release date over 2 years later
Significantly better overclocked clock speed (Water) 4.24 GHz vs 3 GHz More than 40% better overclocked clock speed (Water)
Lower annual commercial energy cost 134.55 $/year vs 144.54 $/year More than 5% lower annual commercial energy cost

Features Key features of the Xeon 7040  vs Core i7 920 

clock speed

Xeon 7040
3 GHz
Core i7 920
2.66 GHz

L2 cache

overclocked clock speed (air)

Xeon 7040
3 GHz
Core i7 920
4.22 GHz

overclocked clock speed (water)

Xeon 7040
3 GHz
Core i7 920
4.24 GHz

TDP

Specifications Full list of technical specs

summary

Xeon 7040  vs
Core i7 920 
Clock speed 3 GHz 2.66 GHz
Cores Dual core Quad core
Socket type
604
LGA 1366
Is unlocked Yes No

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 165W 130W
Annual home energy cost 39.75 $/year 48.38 $/year
Annual commercial energy cost 144.54 $/year 134.55 $/year
Typical power consumption 134.06W 135.63W

memory controller

Memory controller Built-in Built-in
Supports ECC No No

details

Xeon 7040  vs
Core i7 920 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 4 MB 1 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 90 nm 45 nm
Transistor count 230,000,000 731,000,000
Max CPUs 32 1
Clock multiplier 18 20
Voltage range 1.26 - 1.41V 0.8 - 1.38V
Operating temperature Unknown - 76°C Unknown - 67.9°C

overclocking

Overclocked clock speed 3 GHz 4.22 GHz
Overclocked clock speed (Water) 3 GHz 4.24 GHz
Overclocked clock speed (Air) 3 GHz 4.22 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 FSB QPI
Number of links 1 1
Clock speed 667 MHz 2,400 MHz
Intel Xeon 7040
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Intel Core i7 920
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