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Differences What are the advantages of each

Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Higher clock speed 2.26 GHz vs 2.1 GHz Around 10% higher clock speed
Much better overclocked clock speed (Air) 3.28 GHz vs 2.1 GHz More than 55% better overclocked clock speed (Air)
More l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.27 GHz vs 2.1 GHz More than 2x better overclocked clock speed (Water)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Front view of AMD Opteron 2373 EE

Reasons to consider the
AMD Opteron 2373 EE

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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
Significantly lower typical power consumption 32.5W vs 65W 2x lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly lower annual commercial energy cost 35.04 $/year vs 70.08 $/year 2x lower annual commercial energy cost
Significantly lower annual home energy cost 9.64 $/year vs 19.27 $/year 2x lower annual home energy cost

Features Key features of the Xeon E5520  vs Opteron 2373 EE 

clock speed

Xeon E5520
2.26 GHz
Opteron 2373 EE
2.1 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E5520
3.28 GHz
Opteron 2373 EE
2.1 GHz

overclocked clock speed (water)

Xeon E5520
4.27 GHz
Opteron 2373 EE
2.1 GHz

Specifications Full list of technical specs

summary

Xeon E5520  vs
Opteron 2373 EE 
Clock speed 2.26 GHz 2.1 GHz
Cores Quad core Quad core
Socket type
LGA 1366
F

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 40W
Annual home energy cost 19.27 $/year 9.64 $/year
Annual commercial energy cost 70.08 $/year 35.04 $/year
Typical power consumption 65W 32.5W

bus

Architecture QPI HyperTransport 3.0
Clock speed 2,930 MHz 2,000 MHz

details

Xeon E5520  vs
Opteron 2373 EE 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 2 2
Clock multiplier 17 10
Voltage range 0.75 - 1.35V 1 - UnknownV
Operating temperature Unknown - 72°C 0 - 55°C

overclocking

Overclocked clock speed 3.28 GHz 2.1 GHz
Overclocked clock speed (Water) 4.27 GHz 2.1 GHz
Overclocked clock speed (Air) 3.28 GHz 2.1 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
Intel Xeon E5520
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AMD Opteron 2373 EE
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