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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 newer manufacturing process 45 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3.2 GHz vs 0.95 GHz More than 3.2x higher clock speed
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 1 3 more threads
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Front view of AMD Athlon 4 950

Reasons to consider the
AMD Athlon 4 950

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Significantly better overclocked clock speed (Air) 4.19 GHz vs 3.99 GHz More than 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 4.29 GHz vs 4.14 GHz Around 5% better overclocked clock speed (Water)

Features Key features of the Phenom II X4 955  vs Athlon 4 950 

clock speed

Athlon 4 950
0.95 GHz

L2 cache

overclocked clock speed (air)

Phenom II X4 955
3.99 GHz
Athlon 4 950
4.19 GHz

overclocked clock speed (water)

Phenom II X4 955
4.14 GHz
Athlon 4 950
4.29 GHz

Specifications Full list of technical specs

summary

Phenom II X4 955  vs
Athlon 4 950 
Clock speed 3.2 GHz 0.95 GHz
Cores Quad core Single core
Socket type
AM3
462
Slot A
Is unlocked Yes Yes

features

Has a NX bit Yes No
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

bus

Clock speed 2,000 MHz 200 MHz

details

Phenom II X4 955  vs
Athlon 4 950 
Threads 4 1
L2 cache 2 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 180 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.99 GHz 4.19 GHz
Overclocked clock speed (Water) 4.14 GHz 4.29 GHz
Overclocked clock speed (Air) 3.99 GHz 4.19 GHz

power consumption

Typical power consumption 101.56W N/A
AMD Phenom II X4 955
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AMD Athlon 4 950
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