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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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Higher clock speed 3.1 GHz vs 2.9 GHz More than 5% higher clock speed
Significantly lower typical power consumption 36.56W vs 52.81W More than 30% lower typical power consumption
Significantly lower annual home energy cost 10.84 $/year vs 15.66 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 39.42 $/year vs 56.94 $/year More than 30% lower annual commercial energy cost
Front view of AMD Athlon II X2 245

Reasons to consider the
AMD Athlon II X2 245

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Much more l3 cache 1 MB vs 0 MB Compared to all cpus, 1 MB l3 cache is just OK
Much more l3 cache per core 0.5 MB/core vs 0 MB/core Compared to all cpus, 0.5 MB/core l3 cache per core is just OK
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Higher Maximum operating temperature 74 °C vs 72 °C Around 5% higher Maximum operating temperature

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

Specifications Full list of technical specs

summary

Athlon II X2 255e  vs
245 
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
245 
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 - 74°C

power consumption

TDP 45W 65W
Annual home energy cost 10.84 $/year 15.66 $/year
Annual commercial energy cost 39.42 $/year 56.94 $/year
Typical power consumption 36.56W 52.81W

bus

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