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Differences What are the advantages of each

Front view of Intel E5-2658V4

Reasons to consider the
Intel E5-2658V4

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Significantly more l3 cache 35 MB vs 25 MB 40% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 14 vs 10 4 more cores; run more applications at once
More threads 28 vs 20 8 more threads
Higher Maximum operating temperature 91 °C vs 76 °C Around 20% higher Maximum operating temperature
Front view of Intel E5-2640V4

Reasons to consider the
Intel E5-2640V4

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Higher turbo clock speed 3.4 GHz vs 2.8 GHz More than 20% higher turbo clock speed
Lower typical power consumption 73.13W vs 85.31W Around 15% lower typical power consumption
Lower annual home energy cost 21.68 $/year vs 25.29 $/year Around 15% lower annual home energy cost
Lower annual commercial energy cost 78.84 $/year vs 91.98 $/year Around 15% lower annual commercial energy cost

Features Key features of the E5-2658V4  vs E5-2640V4 

clock speed

E5-2658V4
2.3 GHz
E5-2640V4
2.4 GHz

turbo clock speed

E5-2658V4
2.8 GHz
E5-2640V4
3.4 GHz

L3 cache

E5-2658V4
35 MB
E5-2640V4
25 MB

overclocked clock speed (air)

E5-2658V4
2.3 GHz
E5-2640V4
2.4 GHz

overclocked clock speed (water)

E5-2658V4
2.3 GHz
E5-2640V4
2.4 GHz

TDP

E5-2658V4
105W
E5-2640V4
90W

Specifications Full list of technical specs

summary

E5-2658V4  vs
E5-2640V4 
Clock speed 2.3 GHz 2.4 GHz
Turbo clock speed 2.8 GHz 3.4 GHz
Cores Processing Cores Deca 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 105W 90W
Annual home energy cost 25.29 $/year 21.68 $/year
Annual commercial energy cost 91.98 $/year 78.84 $/year
Typical power consumption 85.31W 73.13W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 76,800 MB/s 64,000 MB/s
Transfer rate 9,600 MT/s 8,000 MT/s
Clock speed 4,800 MHz 4,000 MHz

details

E5-2658V4  vs
E5-2640V4 
Architecture x86-64 x86-64
Threads 28 20
L3 cache 35 MB 25 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 2 2
Operating temperature Unknown - 91°C Unknown - 76°C

overclocking

Overclocked clock speed 2.3 GHz 2.4 GHz
Overclocked clock speed (Water) 2.3 GHz 2.4 GHz
Overclocked clock speed (Air) 2.3 GHz 2.4 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 E5-2658V4
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Intel E5-2640V4
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