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Differences What are the advantages of each

Front view of AMD Sempron 145

Reasons to consider the
AMD Sempron 145

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
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 2.8 GHz More than 10% higher clock speed
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Much higher Maximum operating temperature 72 °C vs 63 °C Around 15% higher Maximum operating temperature

Features Key features of the Sempron 145  vs Athlon II X2 255e 

clock speed

Sempron 145
2.8 GHz

L2 cache

Specifications Full list of technical specs

summary

Sempron 145  vs
Athlon II X2 255e 
Clock speed 2.8 GHz 3.1 GHz
Cores Single core Dual core
Is unlocked No No

features

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

details

Sempron 145  vs
Athlon II X2 255e 
Threads 1 2
L2 cache 1 MB 2 MB
L2 cache per core 1 MB/core 1 MB/core
L3 cache 0 MB 0 MB
L3 cache per core 0 MB/core 0 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 63°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 Sempron 145
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AMD Athlon II X2 255e
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