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Differences What are the advantages of each

Front view of Intel Xeon E3-1225 v3

Reasons to consider the
Intel Xeon E3-1225 v3

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Much higher clock speed 3.2 GHz vs 2.4 GHz Around 35% higher clock speed
Much better overclocked clock speed (Air) 3.48 GHz vs 2.4 GHz More than 45% better overclocked clock speed (Air)
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 3.2 GHz vs 2.4 GHz Around 35% better overclocked clock speed (Water)
Front view of Intel Xeon 5600 L5645

Reasons to consider the
Intel Xeon 5600 L5645

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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
Much more l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 4 Three times as many threads
Lower typical power consumption 48.75W vs 68.25W Around 30% 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
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower annual commercial energy cost 52.56 $/year vs 73.58 $/year Around 30% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 20.24 $/year Around 30% lower annual home energy cost

Features Key features of the Xeon E3-1225 v3  vs 5600 L5645 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E3-1225 v3
3.48 GHz
Xeon 5600 L5645
2.4 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon E3-1225 v3  vs
5600 L5645 
Clock speed 3.2 GHz 2.4 GHz
Cores Quad core Hexa 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
AVX 2.0
Supports dynamic frequency scaling Yes Yes

bus

Architecture DMI QPI
Number of links 0 2
Transfer rate 5,000 MT/s 5,860 MT/s

details

Xeon E3-1225 v3  vs
5600 L5645 
Threads 4 12
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 8 MB 12 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 2

overclocking

Overclocked clock speed 3.48 GHz 2.4 GHz
Overclocked clock speed (Water) 3.2 GHz 2.4 GHz
Overclocked clock speed (Air) 3.48 GHz 2.4 GHz

power consumption

TDP 84W 60W
Annual home energy cost 20.24 $/year 14.45 $/year
Annual commercial energy cost 73.58 $/year 52.56 $/year
Typical power consumption 68.25W 48.75W
Intel Xeon E3-1225 v3
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Intel Xeon 5600 L5645
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