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Differences What are the advantages of each

Front view of AMD Athlon II X2 255e

Reasons to consider the
AMD Athlon II X2 255e

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Much higher clock speed 3.1 GHz vs 2.9 GHz More than 5% higher clock speed
Front view of AMD Athlon II X2 245e

Reasons to consider the
AMD Athlon II X2 245e

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines

Features Key features of the Athlon II X2 255e  vs 245e 

Specifications Full list of technical specs

summary

Athlon II X2 255e  vs
245e 
Clock speed 3.1 GHz 2.9 GHz
Cores Dual core Dual core
Is unlocked No No

features

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

details

Athlon II X2 255e  vs
245e 
Threads 2 2
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 1 MB/core
L3 cache 0 MB 1 MB
L3 cache per core 0 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 72°C Unknown - 72°C

power consumption

TDP 45W 45W
Annual home energy cost 10.84 $/year 10.84 $/year
Annual commercial energy cost 39.42 $/year 39.42 $/year
Typical power consumption 36.56W 36.56W

bus

Clock speed 2,000 MHz 2,000 MHz
AMD Athlon II X2 255e
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AMD Athlon II X2 245e
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