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Differences What are the advantages of each

Front view of Intel Xeon E5 2650 v2

Reasons to consider the
Intel Xeon E5 2650 v2

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Much more l3 cache 20 MB vs 10 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 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
More cores 8 vs 4 Twice as many cores; run more applications at once
More threads 16 vs 8 Twice as many threads
Significantly lower typical power consumption 77.19W vs 105.63W More than 25% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Significantly lower annual commercial energy cost 83.22 $/year vs 113.88 $/year More than 25% lower annual commercial energy cost
Significantly lower annual home energy cost 22.89 $/year vs 31.32 $/year More than 25% lower annual home energy cost
Front view of Intel Xeon E5 1620 v2

Reasons to consider the
Intel Xeon E5 1620 v2

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Much higher clock speed 3.7 GHz vs 2.6 GHz More than 40% higher clock speed
Significantly higher turbo clock speed 3.9 GHz vs 3.4 GHz Around 15% higher turbo clock speed
Much better performance per dollar 5.78 pt/$ vs 0.73 pt/$ Around 8x better performance per dollar
Much better overclocked clock speed (Air) 4.21 GHz vs 2.93 GHz Around 45% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.03 GHz vs 3.41 GHz Around 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5 2650 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 2650 v2
1,800,000 MB/s
Xeon E5 1620 v2
2,650,000 MB/s

Specifications Full list of technical specs

summary

Xeon E5 2650 v2  vs
1620 v2 
Clock speed 2.6 GHz 3.7 GHz
Turbo clock speed 3.4 GHz 3.9 GHz
Cores Octa 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 95W 130W
Annual home energy cost 22.89 $/year 31.32 $/year
Annual commercial energy cost 83.22 $/year 113.88 $/year
Performance per watt 8.85 pt/W 13.06 pt/W
Typical power consumption 77.19W 105.63W

bus

Number of links 2 0

details

Xeon E5 2650 v2  vs
1620 v2 
Architecture x86-64 x86-64
Threads 16 8
L2 cache 2 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 10 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 2 1
Clock multiplier 26 37
Operating temperature Unknown - 75°C Unknown - 70°C

overclocking

Overclocked clock speed 2.93 GHz 4.21 GHz
Overclocked clock speed (Water) 3.41 GHz 4.03 GHz
Overclocked clock speed (Air) 2.93 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
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 59,733.32 MB/s 59,733.32 MB/s
Maximum memory size 786,432 MB 262,144 MB
Intel Xeon E5 2650 v2
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Intel Xeon E5 1620 v2
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