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Differences What are the advantages of each

Front view of Intel Xeon E5 2650L v2

Reasons to consider the
Intel Xeon E5 2650L v2

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Much more l3 cache 25 MB vs 15 MB More than 65% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 20 vs 12 8 more threads
Supports more RAM 786,432 MB vs 393,216 MB Supports 2x more RAM
More l2 cache 2.5 MB vs 2 MB 25% more l2 cache; more data can be stored in the l2 cache for quick access later
Lower typical power consumption 56.88W vs 77.19W More than 25% lower typical power consumption
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower annual commercial energy cost 61.32 $/year vs 83.22 $/year More than 25% lower annual commercial energy cost
Lower annual home energy cost 16.86 $/year vs 22.89 $/year More than 25% lower annual home energy cost
Newer Jul, 2013 vs Mar, 2012 Release date over 1 years later
Front view of Intel Xeon E5-2640

Reasons to consider the
Intel Xeon E5-2640

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Much higher clock speed 2.5 GHz vs 1.7 GHz More than 45% higher clock speed
Much higher turbo clock speed 3 GHz vs 2.1 GHz Around 45% higher turbo clock speed
Much better performance per watt 7.66 pt/W vs 3.56 pt/W Around 2.2x better performance per watt
Much better overclocked clock speed (Air) 2.9 GHz vs 1.7 GHz More than 70% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 2.5 GHz vs 1.7 GHz More than 45% better overclocked clock speed (Water)
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 2650L v2 vs E5-2640

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 2650L v2
90,100 MB/s
Xeon E5-2640
1,400,000 MB/s

Specifications Full list of technical specs

summary

Xeon E5 2650L v2  vs
E5-2640 
Clock speed 1.7 GHz 2.5 GHz
Turbo clock speed 2.1 GHz 3 GHz
Cores Deca 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
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 70W 95W
Annual home energy cost 16.86 $/year 22.89 $/year
Annual commercial energy cost 61.32 $/year 83.22 $/year
Performance per watt 3.56 pt/W 7.66 pt/W
Typical power consumption 56.88W 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 2650L v2  vs
E5-2640 
Architecture x86-64 x86-64
Threads 20 12
L2 cache 2.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 25 MB 15 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 2 2
Clock multiplier 17 30
Operating temperature Unknown - 65°C Unknown - 73°C

overclocking

Overclocked clock speed 1.7 GHz 2.9 GHz
Overclocked clock speed (Water) 1.7 GHz 2.5 GHz
Overclocked clock speed (Air) 1.7 GHz 2.9 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
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC No Yes
Maximum bandwidth 25,600 MB/s 42,666.64 MB/s
Maximum memory size 786,432 MB 393,216 MB
Intel Xeon E5 2650L v2
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Intel Xeon E5-2640
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