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Differences What are the advantages of each

Front view of Intel Xeon E5-4620

Reasons to consider the
Intel Xeon E5-4620

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Significantly higher clock speed 2.2 GHz vs 2 GHz More than 10% higher clock speed
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
Higher turbo clock speed 2.6 GHz vs 2.5 GHz Around 5% higher turbo clock speed
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Significantly better overclocked clock speed (Water) 2.2 GHz vs 2 GHz More than 10% better overclocked clock speed (Water)
Front view of Intel Xeon E5-2620

Reasons to consider the
Intel Xeon E5-2620

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Much better performance per dollar 1.52 pt/$ vs 0.27 pt/$ More than 5.5x better performance per dollar
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core

Benchmarks Real world tests of Xeon E5-4620 vs E5-2620

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-4620
61,522
Xeon E5-2620
10,510

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-4620
1,830 MB/s
Xeon E5-2620
1,315,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-4620  vs
E5-2620 
Clock speed 2.2 GHz 2 GHz
Turbo clock speed 2.6 GHz 2.5 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 95W 95W
Annual home energy cost 22.89 $/year 22.89 $/year
Annual commercial energy cost 83.22 $/year 83.22 $/year
Performance per watt 5.25 pt/W 6.57 pt/W
Typical power consumption 77.19W 77.19W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 57,600 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 E5-4620  vs
E5-2620 
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 32 nm 32 nm
Max CPUs 4 2
Voltage range 0.6 - 1.35V 0.6 - 1.35V

overclocking

Overclock popularity 0 4
Overclocked clock speed 2.32 GHz 2.28 GHz
Overclocked clock speed (Water) 2.2 GHz 2 GHz
Overclocked clock speed (Air) 2.32 GHz 2.28 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
DDR3-1333
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 393,216 MB 393,216 MB
Intel Xeon E5-4620
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Intel Xeon E5-2620
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