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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 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
Much higher clock speed 3.2 GHz vs 2.2 GHz More than 45% higher clock speed
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 3.99 GHz vs 2.2 GHz More than 80% better overclocked clock speed (Air)
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Water) 4.14 GHz vs 2.2 GHz Around 90% better overclocked clock speed (Water)
Front view of AMD Athlon Neo X2 6650e

Reasons to consider the
AMD Athlon Neo X2 6650e

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Much lower typical power consumption 28.44W vs 101.56W 3.6x lower typical power consumption
Much lower annual commercial energy cost 30.66 $/year vs 109.5 $/year 3.6x lower annual commercial energy cost
Much lower annual home energy cost 8.43 $/year vs 30.11 $/year 3.6x lower annual home energy cost

Features Key features of the Phenom II X4 955  vs Athlon Neo X2 6650e 

clock speed

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Phenom II X4 955  vs
Athlon Neo X2 6650e 
Clock speed 3.2 GHz 2.2 GHz
Cores Quad core Dual core
Socket type
AM3
AM2

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 1,000 MHz

details

Phenom II X4 955  vs
Athlon Neo X2 6650e 
Threads 4 2
L2 cache 2 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.99 GHz 2.2 GHz
Overclocked clock speed (Water) 4.14 GHz 2.2 GHz
Overclocked clock speed (Air) 3.99 GHz 2.2 GHz

power consumption

TDP 125W 35W
Annual home energy cost 30.11 $/year 8.43 $/year
Annual commercial energy cost 109.5 $/year 30.66 $/year
Typical power consumption 101.56W 28.44W
AMD Phenom II X4 955
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AMD Athlon Neo X2 6650e
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