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Differences What are the advantages of each

Front view of Intel Xeon E5 2640 v2

Reasons to consider the
Intel Xeon E5 2640 v2

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Higher clock speed 2 GHz vs 1.9 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 2.55 GHz vs 1.9 GHz Around 35% better overclocked clock speed (Air)
Higher turbo clock speed 2.5 GHz vs 2.4 GHz Around 5% higher turbo clock speed
Better overclocked clock speed (Water) 2 GHz vs 1.9 GHz More than 5% better overclocked clock speed (Water)
Front view of Intel Xeon E5 2628L v2

Reasons to consider the
Intel Xeon E5 2628L v2

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Much higher Maximum operating temperature 92 °C vs 75 °C Around 25% higher Maximum operating temperature
Lower typical power consumption 56.88W vs 77.19W More than 25% lower typical power consumption
Lower annual commercial energy cost 61.32 $/year vs 83.22 $/year More than 25% lower annual commercial energy cost
Lower annual home energy cost 16.86 $/year vs 22.89 $/year More than 25% lower annual home energy cost

Features Key features of the Xeon E5 2640 v2  vs 2628L v2 

clock speed

turbo clock speed

L2 cache

L3 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E5 2640 v2  vs
2628L v2 
Clock speed 2 GHz 1.9 GHz
Turbo clock speed 2.5 GHz 2.4 GHz
Cores Octa core Octa core
Socket type
LGA 2011
Is unlocked No No

features

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

power consumption

TDP 95W 70W
Annual home energy cost 22.89 $/year 16.86 $/year
Annual commercial energy cost 83.22 $/year 61.32 $/year
Typical power consumption 77.19W 56.88W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 57,600 MB/s 57,600 MB/s
Transfer rate 7,200 MT/s 7,200 MT/s
Clock speed 3,600 MHz 3,600 MHz

details

Xeon E5 2640 v2  vs
2628L v2 
Architecture x86-64 x86-64
Threads 16 16
L2 cache 2 MB 2 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 20 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 2 2
Clock multiplier 20 19
Operating temperature Unknown - 75°C Unknown - 92°C

overclocking

Overclocked clock speed 2.55 GHz 1.9 GHz
Overclocked clock speed (Water) 2 GHz 1.9 GHz
Overclocked clock speed (Air) 2.55 GHz 1.9 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
Channels Quad Channel Quad Channel
Supports ECC Yes No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 786,432 MB 786,432 MB
Intel Xeon E5 2640 v2
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Intel Xeon E5 2628L v2
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