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Differences What are the advantages of each

Front view of Intel Xeon X5687

Reasons to consider the
Intel Xeon X5687

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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 higher Maximum operating temperature 80.4 °C vs 70 °C Around 15% higher Maximum operating temperature
More l3 cache 12 MB vs 10 MB 20% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 4.59 GHz vs 4.21 GHz Around 10% better overclocked clock speed (Air)
More l3 cache per core 3 MB/core vs 2.5 MB/core 20% more l3 cache per core
Supports more RAM 294,912 MB vs 262,144 MB Supports around 15% more RAM
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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Much better performance per dollar 5.78 pt/$ vs 0.42 pt/$ Around 13.8x better performance per dollar
Higher clock speed 3.7 GHz vs 3.6 GHz Around 5% higher clock speed
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 4.03 GHz vs 3.6 GHz More than 10% better overclocked clock speed (Water)
Newer Jul, 2013 vs Feb, 2011 Release date over 2 years later

Benchmarks Real world tests of Xeon X5687 vs E5 1620 v2

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon X5687
10,783

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon X5687
1,510,000 MB/s
Xeon E5 1620 v2
2,650,000 MB/s

Specifications Full list of technical specs

summary

Xeon X5687  vs
E5 1620 v2 
Clock speed 3.6 GHz 3.7 GHz
Turbo clock speed 3.86 GHz 3.9 GHz
Cores Quad core Quad core
Socket type
LGA 1366
LGA 2011

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 5.4 pt/W 13.06 pt/W
Typical power consumption 105.63W 105.63W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 59,733.32 MB/s
Maximum memory size 294,912 MB 262,144 MB

details

Xeon X5687  vs
E5 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 12 MB 10 MB
L3 cache per core 3 MB/core 2.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 1
Clock multiplier 27 37
Voltage range 0.75 - 1.35V 0.65 - 1.3V
Operating temperature Unknown - 80.4°C Unknown - 70°C

overclocking

Overclocked clock speed 4.59 GHz 4.21 GHz
Overclocked clock speed (Water) 3.6 GHz 4.03 GHz
Overclocked clock speed (Air) 4.59 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

bus

Number of links 2 0
Intel Xeon X5687
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Intel Xeon E5 1620 v2
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