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Differences What are the advantages of each

Front view of Intel Xeon EC3539

Reasons to consider the
Intel Xeon EC3539

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Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost
Newer Feb, 2010 vs Mar, 2009 Release date 10 months later
Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Higher clock speed 2.26 GHz vs 2.13 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 3.28 GHz vs 2.13 GHz Around 55% better overclocked clock speed (Air)
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.27 GHz vs 2.13 GHz More than 2x better overclocked clock speed (Water)
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration

Features Key features of the Xeon EC3539  vs E5520 

clock speed

Xeon EC3539
2.13 GHz
Xeon E5520
2.26 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon EC3539
2.13 GHz
Xeon E5520
3.28 GHz

overclocked clock speed (water)

Xeon EC3539
2.13 GHz
Xeon E5520
4.27 GHz

TDP

Specifications Full list of technical specs

summary

Xeon EC3539  vs
E5520 
Clock speed 2.13 GHz 2.26 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 80W
Annual home energy cost 15.66 $/year 19.27 $/year
Annual commercial energy cost 56.94 $/year 70.08 $/year
Typical power consumption 52.81W 65W

memory controller

Memory controller Built-in Built-in
Channels Triple Channel Triple Channel
Supports ECC Yes Yes

details

Xeon EC3539  vs
E5520 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 2
Voltage range 1 - 1.5V 0.75 - 1.35V
Operating temperature Unknown - 74.6°C Unknown - 72°C

overclocking

Overclocked clock speed 2.13 GHz 3.28 GHz
Overclocked clock speed (Water) 2.13 GHz 4.27 GHz
Overclocked clock speed (Air) 2.13 GHz 3.28 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 DMI QPI
Number of links 1 2
Transfer rate 2,500 MT/s 5,860 MT/s
Intel Xeon EC3539
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Intel Xeon E5520
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