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Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much better overclocked clock speed (Air) 3.75 GHz vs 2.66 GHz More than 40% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.33 GHz vs 2.87 GHz More than 50% better overclocked clock speed (Water)
More l3 cache per core 3 MB/core vs 2.5 MB/core 20% more l3 cache per core
Front view of Intel Xeon E5-2620 v3

Reasons to consider the
Intel Xeon E5-2620 v3

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Significantly higher turbo clock speed 3.2 GHz vs 2.66 GHz More than 20% higher turbo clock speed
Much better PassMark score 9,977 vs 4,873 More than 2x better PassMark score
Much better PassMark (Single core) score 1,683 vs 1,059 Around 60% better PassMark (Single core) score
Supports more RAM 786,432 MB vs 294,912 MB Supports around 2.8x more RAM
Significantly more l3 cache 15 MB vs 12 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Jul, 2014 vs Mar, 2010 Release date over 4 years later

Benchmarks Real world tests of Xeon E5620 vs E5-2620 v3

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5620
14,086

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5620
1,280,000 MB/s
Xeon E5-2620 v3
2,750,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5620  vs
E5-2620 v3 
Clock speed 2.4 GHz 2.4 GHz
Turbo clock speed 2.66 GHz 3.2 GHz
Cores Quad core Hexa core

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
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 85W
Annual home energy cost 19.27 $/year 20.48 $/year
Annual commercial energy cost 70.08 $/year 74.46 $/year
Performance per watt 7.59 pt/W 12.6 pt/W
Typical power consumption 65W 69.06W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 64,000 MB/s
Transfer rate 5,860 MT/s 8,000 MT/s
Clock speed 2,930 MHz 4,000 MHz

details

Xeon E5620  vs
E5-2620 v3 
Architecture x86-64 x86-64
Threads 8 12
L3 cache 12 MB 15 MB
L3 cache per core 3 MB/core 2.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 2
Operating temperature Unknown - 77.6°C Unknown - 72.6°C

overclocking

Overclocked clock speed 3.75 GHz 2.66 GHz
Overclocked clock speed (Water) 4.33 GHz 2.87 GHz
Overclocked clock speed (Air) 3.75 GHz 2.66 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
Memory type
DDR3-1066
DDR3-800
DDR3
DDR
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 6,400 MB/s
Maximum memory size 294,912 MB 786,432 MB
Intel Xeon E5620
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Intel Xeon E5-2620 v3
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