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Differences What are the advantages of each

Front view of AMD Phenom II X4 955

Reasons to consider the
AMD Phenom II X4 955

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Much higher clock speed 3.2 GHz vs 2 GHz More than 60% higher clock speed
Much 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
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 1 3 more threads
Much better PassMark score 3,960 vs 626 More than 6.2x better PassMark score
Much better PassMark (Single core) score 1,113 vs 634 More than 75% better PassMark (Single core) score
Much better overclocked clock speed (Air) 3.99 GHz vs 3.11 GHz Around 30% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.14 GHz vs 2 GHz More than 2x better overclocked clock speed (Water)
Front view of AMD Athlon II 170u

Reasons to consider the
AMD Athlon II 170u

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Much lower typical power consumption 16.25W vs 101.56W 6.2x lower typical power consumption
Much higher Maximum operating temperature 80 °C vs 62 °C Around 30% higher Maximum operating temperature
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 4.82 $/year vs 30.11 $/year 6.2x lower annual home energy cost
Much lower annual commercial energy cost 17.52 $/year vs 109.5 $/year 6.3x lower annual commercial energy cost

Benchmarks Real world tests of Phenom II X4 955 vs Athlon II 170u

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Phenom II X4 955
129,850 MB/s
Athlon II 170u
78,400 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X4 955  vs
Athlon II 170u 
Clock speed 3.2 GHz 2 GHz
Cores Quad core Single core

features

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

bus

Clock speed 2,000 MHz 1,800 MHz

details

Phenom II X4 955  vs
Athlon II 170u 
Threads 4 1
L2 cache 2 MB 1 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 62°C Unknown - 80°C

overclocking

Overclocked clock speed 3.99 GHz 3.11 GHz
Overclocked clock speed (Water) 4.14 GHz 2 GHz
PassMark (Overclocked) 3,674.7 1,383.9
Overclocked clock speed (Air) 3.99 GHz 3.11 GHz

power consumption

TDP 125W 20W
Annual home energy cost 30.11 $/year 4.82 $/year
Annual commercial energy cost 109.5 $/year 17.52 $/year
Performance per watt 1.28 pt/W 3.3 pt/W
Typical power consumption 101.56W 16.25W
AMD Phenom II X4 955
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AMD Athlon II 170u
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