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Differences What are the advantages of each

Front view of AMD Athlon II X4 640

Reasons to consider the
AMD Athlon II X4 640

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Higher clock speed 3 GHz vs 2.7 GHz More than 10% higher clock speed
Front view of AMD Athlon II X3 2.7 GHz

Reasons to consider the
AMD Athlon II X3 2.7 GHz

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Much more l2 cache per core 0.67 MB/core vs 0.5 MB/core Around 35% more l2 cache per core

Features Key features of the Athlon II X4 640  vs X3 2.7 GHz 

clock speed

Specifications Full list of technical specs

summary

Athlon II X4 640  vs
X3 2.7 GHz 
Clock speed 3 GHz 2.7 GHz
Cores Quad core Tri 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

details

Athlon II X4 640  vs
X3 2.7 GHz 
Threads 4 3
L2 cache 2 MB 2 MB
L2 cache per core 0.5 MB/core 0.67 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

power consumption

Typical power consumption 77.19W N/A

bus

Clock speed 2,000 MHz 2,000 MHz
AMD Athlon II X4 640
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AMD Athlon II X3 2.7 GHz
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