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Differences What are the advantages of each

Front view of Intel Xeon 5138

Reasons to consider the
Intel Xeon 5138

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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 more l2 cache per core 2 MB/core vs 0.5 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Core i7 640M

Reasons to consider the
Intel Core i7 640M

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Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.8 GHz vs 2.13 GHz More than 30% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly better overclocked clock speed (Air) 3.37 GHz vs 2.13 GHz Around 60% better overclocked clock speed (Air)
Newer Sep, 2010 vs Dec, 2006 Release date over 3 years later
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 2.8 GHz vs 2.13 GHz More than 30% better overclocked clock speed (Water)

Features Key features of the Xeon 5138  vs Core i7 640M 

clock speed

Xeon 5138
2.13 GHz
Core i7 640M
2.8 GHz

L2 cache

overclocked clock speed (air)

Xeon 5138
2.13 GHz
Core i7 640M
3.37 GHz

overclocked clock speed (water)

Xeon 5138
2.13 GHz
Core i7 640M
2.8 GHz

TDP

Specifications Full list of technical specs

summary

Xeon 5138  vs
Core i7 640M 
Clock speed 2.13 GHz 2.8 GHz
Cores Dual core Dual core
Socket type
LGA 771
BGA 1288
rPGA 988A

features

Has a NX bit Yes Yes
Supports trusted computing No 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 35W 35W
Annual home energy cost 8.43 $/year 8.43 $/year
Annual commercial energy cost 30.66 $/year 30.66 $/year
Typical power consumption 28.44W 28.44W

details

Xeon 5138  vs
Core i7 640M 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 4 MB 1 MB
L2 cache per core 2 MB/core 0.5 MB/core
Manufacture process 65 nm 32 nm
Transistor count 291,000,000 382,000,000
Max CPUs 2 1
Clock multiplier 8 21

overclocking

Overclocked clock speed 2.13 GHz 3.37 GHz
Overclocked clock speed (Water) 2.13 GHz 2.8 GHz
Overclocked clock speed (Air) 2.13 GHz 3.37 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 500 MHz
Turbo clock speed N/A 766 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Xeon 5138
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Intel Core i7 640M
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