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Differences What are the advantages of each

Front view of Intel Xeon E5 2637 v2

Reasons to consider the
Intel Xeon E5 2637 v2

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Much more l3 cache 15 MB vs 10 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more RAM 786,432 MB vs 262,144 MB Supports 3x more RAM
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Much more l3 cache per core 3.75 MB/core vs 2.5 MB/core 50% more l3 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Front view of Intel Xeon E5 1620 v2

Reasons to consider the
Intel Xeon E5 1620 v2

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Significantly higher clock speed 3.7 GHz vs 3.5 GHz More than 5% higher clock speed
Much better performance per watt 13.06 pt/W vs 4.36 pt/W Around 3x better performance per watt
Much better performance per dollar 5.78 pt/$ vs 0.57 pt/$ Around 10.2x better performance per dollar
Much better overclocked clock speed (Air) 4.21 GHz vs 3.6 GHz More than 15% better overclocked clock speed (Air)
Higher turbo clock speed 3.9 GHz vs 3.8 GHz Around 5% higher turbo clock speed
Much better overclocked clock speed (Water) 4.03 GHz vs 3.5 GHz More than 15% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5 2637 v2 vs 1620 v2

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5 2637 v2
804,100 MB/s
Xeon E5 1620 v2
2,650,000 MB/s

Specifications Full list of technical specs

summary

Xeon E5 2637 v2  vs
1620 v2 
Clock speed 3.5 GHz 3.7 GHz
Turbo clock speed 3.8 GHz 3.9 GHz
Cores Quad core Quad core
Socket type
LGA 2011
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes No

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
Performance per watt 4.36 pt/W 13.06 pt/W
Typical power consumption 105.63W 105.63W

bus

Number of links 2 0

details

Xeon E5 2637 v2  vs
1620 v2 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 15 MB 10 MB
L3 cache per core 3.75 MB/core 2.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 2 1
Clock multiplier 35 37
Operating temperature Unknown - 76°C Unknown - 70°C

overclocking

Overclocked clock speed 3.6 GHz 4.21 GHz
Overclocked clock speed (Water) 3.5 GHz 4.03 GHz
Overclocked clock speed (Air) 3.6 GHz 4.21 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
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 59,733.32 MB/s
Maximum memory size 786,432 MB 262,144 MB
Intel Xeon E5 2637 v2
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Intel Xeon E5 1620 v2
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