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Differences What are the advantages of each

Front view of AMD Opteron 265

Reasons to consider the
AMD Opteron 265

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Significantly 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
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Significantly higher Maximum operating temperature 67 °C vs 49 °C More than 35% higher Maximum operating temperature
Front view of AMD Athlon X2 4200+

Reasons to consider the
AMD Athlon X2 4200+

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Higher clock speed 2.2 GHz vs 1.8 GHz More than 20% higher clock speed
Better overclocked clock speed (Air) 2.65 GHz vs 2.19 GHz More than 20% better overclocked clock speed (Air)
Lower typical power consumption 72.31W vs 77.19W More than 5% lower typical power consumption
Significantly better overclocked clock speed (Water) 2.9 GHz vs 1.8 GHz More than 60% better overclocked clock speed (Water)
Newer May, 2005 vs Jan, 2005 Release date 5 months later
Lower annual commercial energy cost 77.96 $/year vs 83.22 $/year More than 5% lower annual commercial energy cost
Lower annual home energy cost 21.44 $/year vs 22.89 $/year More than 5% lower annual home energy cost

Features Key features of the Opteron 265  vs Athlon X2 4200+ 

clock speed

Opteron 265
1.8 GHz
Athlon X2 4200+
2.2 GHz

L2 cache

overclocked clock speed (air)

Opteron 265
2.19 GHz
Athlon X2 4200+
2.65 GHz

overclocked clock speed (water)

Opteron 265
1.8 GHz
Athlon X2 4200+
2.9 GHz

Specifications Full list of technical specs

summary

Opteron 265  vs
Athlon X2 4200+ 
Clock speed 1.8 GHz 2.2 GHz
Cores Dual core Dual core
Socket type
940
AM2
939

features

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

details

Opteron 265  vs
Athlon X2 4200+ 
Threads 2 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 2 1
Operating temperature 0 - 67°C Unknown - 49°C

overclocking

Overclocked clock speed 2.19 GHz 2.65 GHz
Overclocked clock speed (Water) 1.8 GHz 2.9 GHz
Overclocked clock speed (Air) 2.19 GHz 2.65 GHz

power consumption

TDP 95W 89W
Annual home energy cost 22.89 $/year 21.44 $/year
Annual commercial energy cost 83.22 $/year 77.96 $/year
Typical power consumption 77.19W 72.31W
AMD Opteron 265
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AMD Athlon X2 4200+
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