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Differences What are the advantages of each

Front view of AMD Phenom X2 B59

Reasons to consider the
AMD Phenom X2 B59

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CPUBoss is not aware of any important advantages of the Phenom X2 B59 vs the Athlon II X4 645.

Front view of AMD Athlon II X4 645

Reasons to consider the
AMD Athlon II X4 645

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CPUBoss is not aware of any important advantages of the Athlon II X4 645 vs the Phenom X2 B59.

Benchmarks Real world tests of Phenom X2 B59 vs Athlon II X4 645

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom X2 B59  vs
Athlon II X4 645 
Clock speed 3.4 GHz 3.1 GHz
Cores Dual core Quad core
Is unlocked No No

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

bus

Clock speed 2,200 MHz 2,000 MHz

details

Phenom X2 B59  vs
Athlon II X4 645 
Threads 2 4
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 0 MB 0.5 MB
L3 cache per core 0 MB/core 0.13 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.34 GHz 3.67 GHz
Overclocked clock speed (Water) 4.61 GHz 3.1 GHz
PassMark (Overclocked) 2,634.1 2,068.5
Overclocked clock speed (Air) 4.34 GHz 3.67 GHz

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 44.01 $/year
Annual commercial energy cost 70.08 $/year 121.5 $/year
Performance per watt 1.35 pt/W 1.08 pt/W
Typical power consumption 65W 122.78W
AMD Phenom X2 B59
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AMD Athlon II X4 645
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