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Differences What are the advantages of each

Front view of AMD Phenom X2 B57

Reasons to consider the
AMD Phenom X2 B57

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CPUBoss is not aware of any important advantages of the Phenom X2 B57 vs the Phenom II X2 550.

Front view of AMD Phenom II X2 550

Reasons to consider the
AMD Phenom II X2 550

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking

Benchmarks Real world tests of Phenom X2 B57 vs II X2 550

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom X2 B57  vs
II X2 550 
Clock speed 3.2 GHz 3.1 GHz
Cores Dual core Dual core
Is unlocked No Yes

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 B57  vs
II X2 550 
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 0 MB 6 MB
L3 cache per core 0 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.3 GHz 3.81 GHz
Overclocked clock speed (Water) 3.2 GHz 3.12 GHz
Overclocked clock speed (Air) 4.3 GHz 3.81 GHz

power consumption

TDP 80W 80W
Annual home energy cost 19.27 $/year 46.25 $/year
Annual commercial energy cost 70.08 $/year 120.89 $/year
Performance per watt 1.22 pt/W 0.89 pt/W
Typical power consumption 65W 124.5W
AMD Phenom X2 B57
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AMD Phenom II X2 550
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