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Differences What are the advantages of each

Front view of Intel Xeon E5540

Reasons to consider the
Intel Xeon E5540

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More cores 4 vs 2 Twice as many cores; run more applications at once
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 2 6 more threads
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Newer Mar, 2009 vs Feb, 2007 Release date over 2 years later
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Front view of AMD Second Generation Opteron 8220

Reasons to consider the
AMD Second Generation Opteron 8220

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Significantly higher clock speed 2.8 GHz vs 2.53 GHz More than 10% higher clock speed
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 l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration

Features Key features of the Xeon E5540  vs Second Generation Opteron 8220 

Specifications Full list of technical specs

summary

Xeon E5540  vs
Second Generation Opteron 8220 
Clock speed 2.53 GHz 2.8 GHz
Cores Quad core Dual core
Socket type
LGA 1366
F

features

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

details

Xeon E5540  vs
Second Generation Opteron 8220 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 8
Operating temperature Unknown - 76°C 0 - 72°C

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 22.89 $/year
Annual commercial energy cost 70.08 $/year 83.22 $/year
Typical power consumption 65W 77.19W
Intel Xeon E5540
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AMD Second Generation Opteron 8220
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