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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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Significantly higher clock speed 3 GHz vs 2 GHz 50% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Higher Maximum operating temperature 65 °C vs 55 °C Around 20% higher Maximum operating temperature
Better overclocked clock speed (Air) 3.14 GHz vs 2.7 GHz More than 15% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 3 GHz vs 2.75 GHz Around 10% better overclocked clock speed (Water)
Front view of AMD Athlon X2 3800+

Reasons to consider the
AMD Athlon X2 3800+

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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 X2 3800+ 

clock speed

L2 cache

overclocked clock speed (air)

Opteron 156
3.14 GHz
Athlon X2 3800+
2.7 GHz

overclocked clock speed (water)

Opteron 156
3 GHz
Athlon X2 3800+
2.75 GHz

Specifications Full list of technical specs

summary

Opteron 156  vs
Athlon X2 3800+ 
Clock speed 3 GHz 2 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 X2 3800+ 
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
Voltage range 1.3 - UnknownV 1.2 - 1.25V
Operating temperature 0 - 65°C Unknown - 55°C

overclocking

Overclocked clock speed 3.14 GHz 2.7 GHz
Overclocked clock speed (Water) 3 GHz 2.75 GHz
Overclocked clock speed (Air) 3.14 GHz 2.7 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 X2 3800+
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