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Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Much higher clock speed 2.26 GHz vs 1.7 GHz Around 35% higher clock speed
Much higher turbo clock speed 2.8 GHz vs 2.1 GHz Around 35% higher turbo clock speed
Much better overclocked clock speed (Air) 3.9 GHz vs 1.7 GHz More than 2.2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 2.27 GHz vs 1.7 GHz Around 35% better overclocked clock speed (Water)
Front view of Intel Xeon E5-2450L v2

Reasons to consider the
Intel Xeon E5-2450L v2

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Much more l3 cache 25 MB vs 12 MB More than 2x 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 393,216 MB vs 294,912 MB Supports around 35% more RAM
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Jan, 2014 vs Mar, 2010 Release date over 3 years later

Features Key features of the Xeon L5640  vs E5-2450L v2 

clock speed

Xeon L5640
2.26 GHz

turbo clock speed

Xeon L5640
2.8 GHz

L3 cache

overclocked clock speed (air)

Xeon L5640
3.9 GHz

overclocked clock speed (water)

Xeon L5640
2.27 GHz

Specifications Full list of technical specs

summary

Xeon L5640  vs
E5-2450L v2 
Clock speed 2.26 GHz 1.7 GHz
Turbo clock speed 2.8 GHz 2.1 GHz
Cores Hexa core Deca core

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 60W 60W
Annual home energy cost 14.45 $/year 14.45 $/year
Annual commercial energy cost 52.56 $/year 52.56 $/year
Typical power consumption 48.75W 48.75W

bus

Architecture QPI QPI
Number of links 2 1
Data rate 46,928 MB/s 28,800 MB/s
Transfer rate 5,860 MT/s 7,200 MT/s
Clock speed 2,930 MHz 3,600 MHz

details

Xeon L5640  vs
E5-2450L v2 
Architecture x86-64 x86-64
Threads 12 20
L3 cache 12 MB 25 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 2
Voltage range 0.75 - 1.35V 0.65 - 1.3V
Operating temperature Unknown - 69.4°C Unknown - 68°C

overclocking

Overclocked clock speed 3.9 GHz 1.7 GHz
Overclocked clock speed (Water) 2.27 GHz 1.7 GHz
Overclocked clock speed (Air) 3.9 GHz 1.7 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
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 38,400 MB/s
Maximum memory size 294,912 MB 393,216 MB
Intel Xeon L5640
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Intel Xeon E5-2450L v2
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