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Differences What are the advantages of each

Front view of AMD Phenom X4 9550

Reasons to consider the
AMD Phenom X4 9550

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Much newer manufacturing process 65 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0.25 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 2.2 GHz vs 0.9 GHz Around 2.5x higher clock speed
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 1 3 more threads
Much better overclocked clock speed (Air) 2.77 GHz vs 0.98 GHz More than 2.8x better overclocked clock speed (Air)
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much better overclocked clock speed (Water) 3.05 GHz vs 0.9 GHz Around 3.5x better overclocked clock speed (Water)
Front view of AMD Athlon 900

Reasons to consider the
AMD Athlon 900

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CPUBoss is not aware of any important advantages of the Athlon 900 vs the Phenom X4 9550.

Features Key features of the Phenom X4 9550  vs Athlon 900 

clock speed

Phenom X4 9550
2.2 GHz
Athlon 900
0.9 GHz

L2 cache

Athlon 900
0.25 MB

overclocked clock speed (air)

Phenom X4 9550
2.77 GHz
Athlon 900
0.98 GHz

overclocked clock speed (water)

Phenom X4 9550
3.05 GHz
Athlon 900
0.9 GHz

Specifications Full list of technical specs

summary

Phenom X4 9550  vs
Athlon 900 
Clock speed 2.2 GHz 0.9 GHz
Cores Quad core Single core
Socket type
AM2+
Slot A

features

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

bus

Clock speed 1,800 MHz 200 MHz

details

Phenom X4 9550  vs
Athlon 900 
Threads 4 1
L2 cache 2 MB 0.25 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
Manufacture process 65 nm 180 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.77 GHz 0.98 GHz
Overclocked clock speed (Water) 3.05 GHz 0.9 GHz
Overclocked clock speed (Air) 2.77 GHz 0.98 GHz

power consumption

Typical power consumption 77.19W N/A
AMD Phenom X4 9550
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AMD Athlon 900
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