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Differences What are the advantages of each

Front view of AMD Athlon 64 X2 4400+

Reasons to consider the
AMD Athlon 64 X2 4400+

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More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Better overclocked clock speed (Air) 2.75 GHz vs 2.7 GHz Almost the same
Significantly better overclocked clock speed (Water) 3.13 GHz vs 2.7 GHz More than 15% better overclocked clock speed (Water)
Front view of AMD Athlon 1640B

Reasons to consider the
AMD Athlon 1640B

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Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 2.7 GHz vs 2.3 GHz More than 15% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
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

Benchmarks Real world tests of Athlon 64 X2 4400+ vs 1640B

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Athlon 64 X2 4400+
85.5 MB/s
Athlon 1640B
64.8 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon 64 X2 4400+  vs
1640B 
Clock speed 2.3 GHz 2.7 GHz
Cores Dual core Single core
Socket type
AM2
939

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
3DNow!

details

Athlon 64 X2 4400+  vs
1640B 
Threads 2 1
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 90 nm 65 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.75 GHz 2.7 GHz
Overclocked clock speed (Water) 3.13 GHz 2.7 GHz
Overclocked clock speed (Air) 2.75 GHz 2.7 GHz

power consumption

TDP 65W 45W
Annual home energy cost 15.66 $/year 10.84 $/year
Annual commercial energy cost 56.94 $/year 39.42 $/year
Performance per watt 0.89 pt/W 0.93 pt/W
Typical power consumption 52.81W 36.56W
AMD Athlon 64 X2 4400+
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AMD Athlon 1640B
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