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Differences What are the advantages of each

Front view of AMD Opteron 156

Reasons to consider the
AMD Opteron 156

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Higher clock speed 3 GHz vs 2.3 GHz More than 30% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Better overclocked clock speed (Air) 3.14 GHz vs 2.75 GHz Around 15% better overclocked clock speed (Air)
Front view of AMD Athlon 64 X2 4400+

Reasons to consider the
AMD Athlon 64 X2 4400+

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Much lower typical power consumption 52.81W vs 84.5W Around 40% lower typical power consumption
More cores 2 vs 1 Twice as many cores; run more applications at once
Much lower annual home energy cost 15.66 $/year vs 25.05 $/year Around 40% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 91.1 $/year Around 40% lower annual commercial energy cost

Features Key features of the Opteron 156  vs Athlon 64 X2 4400+ 

clock speed

L2 cache

overclocked clock speed (air)

Opteron 156
3.14 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Opteron 156  vs
Athlon 64 X2 4400+ 
Clock speed 3 GHz 2.3 GHz
Cores Single core Dual core
Socket type
939
AM2

features

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

details

Opteron 156  vs
Athlon 64 X2 4400+ 
Threads 1 2
L2 cache 1 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.14 GHz 2.75 GHz
Overclocked clock speed (Water) 3 GHz 3.13 GHz
Overclocked clock speed (Air) 3.14 GHz 2.75 GHz

power consumption

TDP 104W 65W
Annual home energy cost 25.05 $/year 15.66 $/year
Annual commercial energy cost 91.1 $/year 56.94 $/year
Typical power consumption 84.5W 52.81W
AMD Opteron 156
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AMD Athlon 64 X2 4400+
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