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Differences What are the advantages of each

Front view of AMD Phenom II X4 965

Reasons to consider the
AMD Phenom II X4 965

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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
Much higher clock speed 3.4 GHz vs 1.8 GHz Around 90% higher clock speed
Much better overclocked clock speed (Air) 4.05 GHz vs 2.19 GHz Around 85% better overclocked clock speed (Air)
Newer Nov, 2009 vs Jan, 2005 Release date over 4 years later
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.22 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Front view of AMD Opteron 265

Reasons to consider the
AMD Opteron 265

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Much lower typical power consumption 77.19W vs 152.93W Around 50% lower typical power consumption
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
Much lower annual home energy cost 22.89 $/year vs 54.06 $/year 2.4x lower annual home energy cost
Much lower annual commercial energy cost 83.22 $/year vs 152.42 $/year More than 45% lower annual commercial energy cost
Higher Maximum operating temperature 67 °C vs 62 °C Around 10% higher Maximum operating temperature

Features Key features of the Phenom II X4 965  vs Opteron 265 

clock speed

Opteron 265
1.8 GHz

L2 cache

overclocked clock speed (air)

Phenom II X4 965
4.05 GHz
Opteron 265
2.19 GHz

overclocked clock speed (water)

Phenom II X4 965
4.22 GHz
Opteron 265
1.8 GHz

Specifications Full list of technical specs

summary

Phenom II X4 965  vs
Opteron 265 
Clock speed 3.4 GHz 1.8 GHz
Cores Quad core Dual core
Socket type
AM3
940

features

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

details

Phenom II X4 965  vs
Opteron 265 
Threads 4 2
L2 cache 2 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 2
Clock multiplier 17 9
Voltage range 0.85 - 1.43V 1 - UnknownV
Operating temperature Unknown - 62°C 0 - 67°C

overclocking

Overclocked clock speed 4.05 GHz 2.19 GHz
Overclocked clock speed (Water) 4.22 GHz 1.8 GHz
Overclocked clock speed (Air) 4.05 GHz 2.19 GHz

power consumption

TDP 140W 95W
Annual home energy cost 54.06 $/year 22.89 $/year
Annual commercial energy cost 152.42 $/year 83.22 $/year
Typical power consumption 152.93W 77.19W
AMD Phenom II X4 965
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AMD Opteron 265
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