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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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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
Front view of AMD Athlon II X4 640

Reasons to consider the
AMD Athlon II X4 640

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 3 GHz vs 1.8 GHz More than 65% higher clock speed
Much better overclocked clock speed (Air) 3.57 GHz vs 2.19 GHz Around 65% better overclocked clock speed (Air)
Newer May, 2010 vs Jan, 2005 Release date over 5 years later
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 3.89 GHz vs 1.8 GHz Around 2.2x better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Higher Maximum operating temperature 71 °C vs 67 °C More than 5% higher Maximum operating temperature

Features Key features of the Opteron 265  vs Athlon II X4 640 

clock speed

L2 cache

overclocked clock speed (air)

Opteron 265
2.19 GHz
Athlon II X4 640
3.57 GHz

overclocked clock speed (water)

Opteron 265
1.8 GHz
Athlon II X4 640
3.89 GHz

Specifications Full list of technical specs

summary

Opteron 265  vs
Athlon II X4 640 
Clock speed 1.8 GHz 3 GHz
Cores Dual core Quad core
Socket type
940
AM3

features

Has a NX bit Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

details

Opteron 265  vs
Athlon II X4 640 
Threads 2 4
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 45 nm
Max CPUs 2 1
Voltage range 1 - UnknownV 1.05 - 1.4V
Operating temperature 0 - 67°C Unknown - 71°C

overclocking

Overclocked clock speed 2.19 GHz 3.57 GHz
Overclocked clock speed (Water) 1.8 GHz 3.89 GHz
Overclocked clock speed (Air) 2.19 GHz 3.57 GHz

power consumption

TDP 95W 95W
Annual home energy cost 22.89 $/year 22.89 $/year
Annual commercial energy cost 83.22 $/year 83.22 $/year
Typical power consumption 77.19W 77.19W
AMD Opteron 265
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AMD Athlon II X4 640
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