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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 1.9 GHz Around 20% higher clock speed
Significantly higher turbo clock speed 2.8 GHz vs 2.4 GHz More than 15% higher turbo clock speed
Much better overclocked clock speed (Air) 3.9 GHz vs 1.9 GHz More than 2x better overclocked clock speed (Air)
Lower typical power consumption 48.75W vs 56.88W Around 15% lower typical power consumption
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Much better overclocked clock speed (Water) 2.27 GHz vs 1.9 GHz Around 20% better overclocked clock speed (Water)
Lower annual commercial energy cost 52.56 $/year vs 61.32 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 16.86 $/year Around 15% lower annual home energy cost
Front view of Intel Xeon E5 2628L v2

Reasons to consider the
Intel Xeon E5 2628L v2

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Much more l3 cache 20 MB vs 12 MB More than 65% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more RAM 786,432 MB vs 294,912 MB Supports around 2.8x more RAM
Much higher Maximum operating temperature 92 °C vs 69.4 °C Around 35% higher Maximum operating temperature
More threads 16 vs 12 4 more threads
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 Jul, 2013 vs Mar, 2010 Release date over 3 years later

Features Key features of the Xeon L5640  vs E5 2628L v2 

clock speed

Xeon L5640
2.26 GHz

turbo clock speed

Xeon L5640
2.8 GHz

L2 cache

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 2628L v2 
Clock speed 2.26 GHz 1.9 GHz
Turbo clock speed 2.8 GHz 2.4 GHz
Cores Hexa core Octa 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
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 70W
Annual home energy cost 14.45 $/year 16.86 $/year
Annual commercial energy cost 52.56 $/year 61.32 $/year
Typical power consumption 48.75W 56.88W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Quad Channel
Supports ECC Yes No
Maximum bandwidth 31,999.98 MB/s 25,600 MB/s
Maximum memory size 294,912 MB 786,432 MB

details

Xeon L5640  vs
E5 2628L v2 
Architecture x86-64 x86-64
Threads 12 16
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 20 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 2
Clock multiplier 17 19
Operating temperature Unknown - 69.4°C Unknown - 92°C

overclocking

Overclocked clock speed 3.9 GHz 1.9 GHz
Overclocked clock speed (Water) 2.27 GHz 1.9 GHz
Overclocked clock speed (Air) 3.9 GHz 1.9 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

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 57,600 MB/s
Transfer rate 5,860 MT/s 7,200 MT/s
Clock speed 2,930 MHz 3,600 MHz
Intel Xeon L5640
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Intel Xeon E5 2628L v2
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