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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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Much more l3 cache 20 MB vs 16 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 16 vs 8 Twice as many threads
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Front view of Intel Xeon E5-4627 v2

Reasons to consider the
Intel Xeon E5-4627 v2

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Much higher clock speed 3.3 GHz vs 2.7 GHz More than 20% higher clock speed
Higher turbo clock speed 3.6 GHz vs 3.3 GHz Around 10% higher turbo clock speed
Supports more RAM 786,432 MB vs 393,216 MB Supports 2x more RAM
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Jan, 2014 vs May, 2012 Release date over 1 years later

Features Key features of the Xeon E5-4650  vs E5-4627 v2 

clock speed

Xeon E5-4650
2.7 GHz
Xeon E5-4627 v2
3.3 GHz

turbo clock speed

Xeon E5-4650
3.3 GHz
Xeon E5-4627 v2
3.6 GHz

L3 cache

Specifications Full list of technical specs

summary

Xeon E5-4650  vs
E5-4627 v2 
Clock speed 2.7 GHz 3.3 GHz
Turbo clock speed 3.3 GHz 3.6 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
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 59,733.32 MB/s
Maximum memory size 393,216 MB 786,432 MB

details

Xeon E5-4650  vs
E5-4627 v2 
Architecture x86-64 x86-64
Threads 16 8
L3 cache 20 MB 16 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 4 4
Voltage range 0.6 - 1.35V 0.65 - 1.3V

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

power consumption

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

bus

Architecture QPI QPI
Number of links 2 2
Data rate 64,000 MB/s 57,600 MB/s
Transfer rate 8,000 MT/s 7,200 MT/s
Clock speed 4,000 MHz 3,600 MHz
Intel Xeon E5-4650
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Intel Xeon E5-4627 v2
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