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Differences What are the advantages of each

Front view of Intel Xeon E7-2820

Reasons to consider the
Intel Xeon E7-2820

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Supports more RAM 1,048,576 MB vs 786,432 MB Supports around 35% more RAM
Front view of Intel Xeon E5 2660 v2

Reasons to consider the
Intel Xeon E5 2660 v2

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Much more l3 cache 25 MB vs 18 MB Around 40% more l3 cache; more data can be stored in the l3 cache for quick access later
Much higher turbo clock speed 3 GHz vs 2.27 GHz More than 30% higher turbo clock speed
Significantly higher clock speed 2.2 GHz vs 2 GHz More than 10% higher clock speed
More l2 cache 2.5 MB vs 2 MB 25% more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 20 vs 16 4 more threads
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 77.19W vs 85.31W Around 10% lower typical power consumption
Newer Jul, 2013 vs Apr, 2011 Release date over 2 years later
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 E7-2820  vs E5 2660 v2 

clock speed

turbo clock speed

Xeon E7-2820
2.27 GHz

L2 cache

L3 cache

Specifications Full list of technical specs

summary

Xeon E7-2820  vs
E5 2660 v2 
Clock speed 2 GHz 2.2 GHz
Turbo clock speed 2.27 GHz 3 GHz
Cores Octa core Dodeca core
Socket type
LGA 1567
LGA 2011

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
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
DDR
Channels Quad Channel Quad Channel
Supports ECC Yes No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 1,048,576 MB 786,432 MB

details

Xeon E7-2820  vs
E5 2660 v2 
Architecture x86-64 x86-64
Threads 16 20
L2 cache 2 MB 2.5 MB
L3 cache 18 MB 25 MB
Manufacture process 32 nm 22 nm
Max CPUs 2 2
Clock multiplier 15 22
Operating temperature Unknown - 64°C Unknown - 75°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

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 1 2
Data rate 23,464 MB/s 64,000 MB/s
Transfer rate 5,860 MT/s 8,000 MT/s
Clock speed 2,930 MHz 4,000 MHz
Intel Xeon E7-2820
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Intel Xeon E5 2660 v2
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