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Differences What are the advantages of each

Front view of AMD Athlon II X2 270

Reasons to consider the
AMD Athlon II X2 270

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Much higher clock speed 3.4 GHz vs 1.6 GHz More than 2x higher clock speed
Much newer manufacturing process 45 nm vs 90 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 better overclocked clock speed (Air) 4.02 GHz vs 1.6 GHz More than 2.5x better overclocked clock speed (Air)
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Newer May, 2011 vs May, 2004 Release date over 7 years later
Much better overclocked clock speed (Water) 4.09 GHz vs 1.6 GHz More than 2.5x better overclocked clock speed (Water)
More cores 2 vs 1 Twice as many cores; run more applications at once
Front view of AMD Athlon 64 2700+

Reasons to consider the
AMD Athlon 64 2700+

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Significantly lower typical power consumption 28.44W vs 52.81W More than 45% lower typical power consumption
Significantly lower annual home energy cost 8.43 $/year vs 15.66 $/year More than 45% lower annual home energy cost
Significantly lower annual commercial energy cost 30.66 $/year vs 56.94 $/year More than 45% lower annual commercial energy cost

Features Key features of the Athlon II X2 270  vs 64 2700+ 

clock speed

L2 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Athlon II X2 270  vs
64 2700+ 
Clock speed 3.4 GHz 1.6 GHz
Cores Dual core Single core

features

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

details

Athlon II X2 270  vs
64 2700+ 
Threads 2 1
L2 cache 2 MB 0.5 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.02 GHz 1.6 GHz
Overclocked clock speed (Water) 4.09 GHz 1.6 GHz
Overclocked clock speed (Air) 4.02 GHz 1.6 GHz

power consumption

TDP 65W 35W
Annual home energy cost 15.66 $/year 8.43 $/year
Annual commercial energy cost 56.94 $/year 30.66 $/year
Typical power consumption 52.81W 28.44W
AMD Athlon II X2 270
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AMD Athlon 64 2700+
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