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Differences What are the advantages of each

Front view of Intel Xeon E7-4820 v2

Reasons to consider the
Intel Xeon E7-4820 v2

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Supports more RAM 1,572,864 MB vs 393,216 MB Supports 4x more RAM
More threads 16 vs 12 4 more threads
More l3 cache 16 MB vs 15 MB More than 5% more l3 cache; more data can be stored in the l3 cache for quick access later
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Newer Feb, 2014 vs Mar, 2012 Release date over 1 years later
Front view of Intel Xeon E5-2640

Reasons to consider the
Intel Xeon E5-2640

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Much higher clock speed 2.5 GHz vs 2 GHz 25% higher clock speed
Significantly higher turbo clock speed 3 GHz vs 2.5 GHz 20% higher turbo clock speed
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Lower typical power consumption 77.19W vs 85.31W Around 10% lower typical power consumption
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Lower annual commercial energy cost 83.22 $/year vs 91.98 $/year Around 10% lower annual commercial energy cost
Lower annual home energy cost 22.89 $/year vs 25.29 $/year Around 10% lower annual home energy cost

Features Key features of the Xeon E7-4820 v2  vs E5-2640 

clock speed

turbo clock speed

L2 cache

L3 cache

Specifications Full list of technical specs

summary

Xeon E7-4820 v2  vs
E5-2640 
Clock speed 2 GHz 2.5 GHz
Turbo clock speed 2.5 GHz 3 GHz
Cores Octa core Hexa core
Socket type
LGA 2011

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

power consumption

TDP 105W 95W
Annual home energy cost 25.29 $/year 22.89 $/year
Annual commercial energy cost 91.98 $/year 83.22 $/year
Typical power consumption 85.31W 77.19W

bus

Architecture QPI QPI
Number of links 3 2
Data rate 86,400 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 E7-4820 v2  vs
E5-2640 
Architecture x86-64 x86-64
Threads 16 12
L2 cache 2 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 16 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 4 2
Clock multiplier 20 30
Operating temperature Unknown - 68°C Unknown - 73°C

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
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 42,666.64 MB/s 42,666.64 MB/s
Maximum memory size 1,572,864 MB 393,216 MB
Intel Xeon E7-4820 v2
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Intel Xeon E5-2640
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