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Differences What are the advantages of each

Front view of Intel Xeon E5 2620 v2

Reasons to consider the
Intel Xeon E5 2620 v2

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Significantly more l3 cache 15 MB vs 12 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
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
Front view of Intel Xeon 5600 L5645

Reasons to consider the
Intel Xeon 5600 L5645

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Much higher clock speed 2.4 GHz vs 2.1 GHz Around 15% higher clock speed
More l2 cache 2 MB vs 1.5 MB Around 35% more l2 cache; more data can be stored in the l2 cache for quick access later
Lower typical power consumption 48.75W vs 65W 25% lower typical power consumption
Better overclocked clock speed (Air) 2.4 GHz vs 2.25 GHz More than 5% better overclocked clock speed (Air)
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Significantly better overclocked clock speed (Water) 2.4 GHz vs 2.1 GHz Around 15% better overclocked clock speed (Water)
Lower annual commercial energy cost 52.56 $/year vs 70.08 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 19.27 $/year Around 25% lower annual home energy cost

Features Key features of the Xeon E5 2620 v2  vs 5600 L5645 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E5 2620 v2
2.25 GHz
Xeon 5600 L5645
2.4 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E5 2620 v2  vs
5600 L5645 
Clock speed 2.1 GHz 2.4 GHz
Cores Hexa core Hexa core
Socket type
LGA 2011
LGA 1366

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

bus

Architecture QPI QPI
Number of links 2 2
Data rate 57,600 MB/s 46,928 MB/s
Transfer rate 7,200 MT/s 5,860 MT/s
Clock speed 3,600 MHz 2,933 MHz

details

Xeon E5 2620 v2  vs
5600 L5645 
Threads 12 12
L2 cache 1.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 15 MB 12 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 2 2

overclocking

Overclocked clock speed 2.25 GHz 2.4 GHz
Overclocked clock speed (Water) 2.1 GHz 2.4 GHz
Overclocked clock speed (Air) 2.25 GHz 2.4 GHz

power consumption

TDP 80W 60W
Annual home energy cost 19.27 $/year 14.45 $/year
Annual commercial energy cost 70.08 $/year 52.56 $/year
Typical power consumption 65W 48.75W
Intel Xeon E5 2620 v2
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Intel Xeon 5600 L5645
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