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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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Higher clock speed 3.2 GHz vs 3 GHz More than 5% higher clock speed
Significantly better overclocked clock speed (Air) 4.3 GHz vs 4.07 GHz More than 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 3.2 GHz vs 3 GHz More than 5% better overclocked clock speed (Water)
Front view of AMD Athlon II X2 B24

Reasons to consider the
AMD Athlon II X2 B24

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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 l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
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
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost

Benchmarks Real world tests of Phenom X2 B57 vs Athlon II X2 B24

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom X2 B57  vs
Athlon II X2 B24 
Clock speed 3.2 GHz 3 GHz
Cores Dual core Dual 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 B57  vs
Athlon II X2 B24 
Threads 2 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 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

overclocking

Overclocked clock speed 4.3 GHz 4.07 GHz
Overclocked clock speed (Water) 3.2 GHz 3 GHz
Overclocked clock speed (Air) 4.3 GHz 4.07 GHz

power consumption

TDP 80W 65W
Annual home energy cost 19.27 $/year 15.66 $/year
Annual commercial energy cost 70.08 $/year 56.94 $/year
Performance per watt 1.22 pt/W 1.44 pt/W
Typical power consumption 65W 52.81W
AMD Phenom X2 B57
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AMD Athlon II X2 B24
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