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Differences What are the advantages of each

Front view of Intel Xeon X5570

Reasons to consider the
Intel Xeon X5570

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More cores 4 vs 1 3 more cores; run more applications at once
Higher clock speed 2.93 GHz vs 2.8 GHz Around 5% higher clock speed
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More threads 8 vs 1 7 more threads
Much better overclocked clock speed (Air) 3.75 GHz vs 3 GHz Around 25% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.58 GHz vs 2.8 GHz Around 65% better overclocked clock speed (Water)
Newer Mar, 2009 vs Aug, 2005 Release date over 3 years later
Front view of AMD Opteron 254

Reasons to consider the
AMD Opteron 254

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Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core

Benchmarks Real world tests of Xeon X5570 vs Opteron 254

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon X5570  vs
Opteron 254 
Clock speed 2.93 GHz 2.8 GHz
Cores Quad core Single core
Socket type
LGA 1366
940

features

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

details

Xeon X5570  vs
Opteron 254 
Threads 8 1
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 2
Clock multiplier 22 14
Voltage range 0.75 - 1.35V 1.3 - UnknownV
Operating temperature Unknown - 75°C 0 - 67°C

overclocking

Overclocked clock speed 3.75 GHz 3 GHz
Overclocked clock speed (Water) 4.58 GHz 2.8 GHz
Overclocked clock speed (Air) 3.75 GHz 3 GHz

power consumption

TDP 95W 92.6W
Annual home energy cost 22.89 $/year 22.31 $/year
Annual commercial energy cost 83.22 $/year 81.12 $/year
Performance per watt 2.61 pt/W 0.69 pt/W
Typical power consumption 77.19W 75.24W
Intel Xeon X5570
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AMD Opteron 254
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