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Differences What are the advantages of each

Front view of Intel Xeon E5345

Reasons to consider the
Intel Xeon E5345

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 1 3 more cores; run more applications at once
Much more l2 cache per core 2 MB/core vs 1 MB/core 2x more l2 cache per core
Newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More threads 4 vs 1 3 more threads
Front view of AMD Opteron 250

Reasons to consider the
AMD Opteron 250

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Much lower typical power consumption 2.44W vs 65W 26.7x lower typical power consumption
Higher clock speed 2.4 GHz vs 2.33 GHz Around 5% higher clock speed
Much lower annual commercial energy cost 2.63 $/year vs 70.08 $/year 26.7x lower annual commercial energy cost
Much lower annual home energy cost 0.72 $/year vs 19.27 $/year 26.7x lower annual home energy cost

Features Key features of the Xeon E5345  vs Opteron 250 

clock speed

Xeon E5345
2.33 GHz
Opteron 250
2.4 GHz

L2 cache

TDP

Specifications Full list of technical specs

summary

Xeon E5345  vs
Opteron 250 
Clock speed 2.33 GHz 2.4 GHz
Cores Quad core Single core
Socket type
LGA 771
940

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

details

Xeon E5345  vs
Opteron 250 
Threads 4 1
L2 cache 8 MB 1 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 90 nm
Max CPUs 2 2
Operating temperature Unknown - 66°C 0 - 71°C

power consumption

TDP 80W 3W
Annual home energy cost 19.27 $/year 0.72 $/year
Annual commercial energy cost 70.08 $/year 2.63 $/year
Typical power consumption 65W 2.44W
Intel Xeon E5345
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AMD Opteron 250
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