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Differences What are the advantages of each

Front view of Intel E5-4655V4

Reasons to consider the
Intel E5-4655V4

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Higher turbo clock speed 3.2 GHz vs 2.6 GHz Around 25% higher turbo clock speed
Higher clock speed 2.5 GHz vs 2.1 GHz Around 20% higher clock speed
Better overclocked clock speed (Air) 2.5 GHz vs 2.1 GHz Around 20% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 2.5 GHz vs 2.1 GHz Around 20% better overclocked clock speed (Water)
Front view of Intel E5-4640V4

Reasons to consider the
Intel E5-4640V4

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Significantly lower typical power consumption 85.31W vs 109.69W More than 20% lower typical power consumption
More cores 12 vs 8 4 more cores; run more applications at once
More threads 24 vs 16 8 more threads
Significantly lower annual home energy cost 25.29 $/year vs 32.52 $/year More than 20% lower annual home energy cost
Significantly lower annual commercial energy cost 91.98 $/year vs 118.26 $/year More than 20% lower annual commercial energy cost

Features Key features of the E5-4655V4  vs E5-4640V4 

clock speed

E5-4655V4
2.5 GHz
E5-4640V4
2.1 GHz

turbo clock speed

E5-4655V4
3.2 GHz
E5-4640V4
2.6 GHz

overclocked clock speed (air)

E5-4655V4
2.5 GHz
E5-4640V4
2.1 GHz

overclocked clock speed (water)

E5-4655V4
2.5 GHz
E5-4640V4
2.1 GHz

TDP

E5-4655V4
135W
E5-4640V4
105W

Specifications Full list of technical specs

summary

E5-4655V4  vs
E5-4640V4 
Clock speed 2.5 GHz 2.1 GHz
Turbo clock speed 3.2 GHz 2.6 GHz
Cores Octa core Duodeca core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
AES
AVX
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 135W 105W
Annual home energy cost 32.52 $/year 25.29 $/year
Annual commercial energy cost 118.26 $/year 91.98 $/year
Typical power consumption 109.69W 85.31W

bus

Architecture FSB FSB
Number of links 2 2
Transfer rate 9,600 MT/s 8,000 MT/s

details

E5-4655V4  vs
E5-4640V4 
Architecture x86-64 x86-64
Threads 16 24
Manufacture process 14 nm 14 nm
Max CPUs 4 4

overclocking

Overclocked clock speed 2.5 GHz 2.1 GHz
Overclocked clock speed (Water) 2.5 GHz 2.1 GHz
Overclocked clock speed (Air) 2.5 GHz 2.1 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
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum memory size 1,572,864 MB 1,572,864 MB
Intel E5-4655V4
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Intel E5-4640V4
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