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Differences What are the advantages of each

Front view of Intel Xeon E5-4650

Reasons to consider the
Intel Xeon E5-4650

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Higher clock speed 2.7 GHz vs 2.5 GHz Around 10% higher clock speed
Better overclocked clock speed (Air) 2.94 GHz vs 2.5 GHz More than 15% better overclocked clock speed (Air)
Slightly lower typical power consumption 105.63W vs 109.69W Around 5% lower typical power consumption
Slightly better overclocked clock speed (Water) 2.7 GHz vs 2.5 GHz Around 10% better overclocked clock speed (Water)
Slightly lower annual home energy cost 31.32 $/year vs 32.52 $/year Around 5% lower annual home energy cost
Slightly lower annual commercial energy cost 113.88 $/year vs 118.26 $/year Around 5% lower annual commercial energy cost
Front view of Intel E5-4655V4

Reasons to consider the
Intel E5-4655V4

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Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more RAM 1,572,864 MB vs 393,216 MB Supports 4x more RAM
Newer Apr, 2016 vs May, 2012 Release date over 3 years later

Features Key features of the Xeon E5-4650  vs E5-4655V4 

clock speed

Xeon E5-4650
2.7 GHz
E5-4655V4
2.5 GHz

turbo clock speed

Xeon E5-4650
3.3 GHz
E5-4655V4
3.2 GHz

overclocked clock speed (air)

Xeon E5-4650
2.94 GHz
E5-4655V4
2.5 GHz

overclocked clock speed (water)

Xeon E5-4650
2.7 GHz
E5-4655V4
2.5 GHz

TDP

Specifications Full list of technical specs

summary

Xeon E5-4650  vs
E5-4655V4 
Clock speed 2.7 GHz 2.5 GHz
Turbo clock speed 3.3 GHz 3.2 GHz
Cores Octa core Octa core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 135W
Annual home energy cost 31.32 $/year 32.52 $/year
Annual commercial energy cost 113.88 $/year 118.26 $/year
Typical power consumption 105.63W 109.69W

bus

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

details

Xeon E5-4650  vs
E5-4655V4 
Architecture x86-64 x86-64
Threads 16 16
Manufacture process 32 nm 14 nm
Max CPUs 4 4

overclocking

Overclocked clock speed 2.94 GHz 2.5 GHz
Overclocked clock speed (Water) 2.7 GHz 2.5 GHz
Overclocked clock speed (Air) 2.94 GHz 2.5 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 393,216 MB 1,572,864 MB
Intel Xeon E5-4650
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Intel E5-4655V4
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