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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
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Significantly lower typical power consumption 52.81W vs 72.31W More than 25% lower typical power consumption
Significantly lower annual home energy cost 15.66 $/year vs 21.44 $/year More than 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 77.96 $/year More than 25% lower annual commercial energy cost
Better overclocked clock speed (Water) 3.13 GHz vs 2.9 GHz Around 10% better overclocked clock speed (Water)
Front view of AMD Athlon 4000+

Reasons to consider the
AMD Athlon 4000+

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Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Higher clock speed 2.4 GHz vs 2.3 GHz Around 5% higher clock speed
Significantly better overclocked clock speed (Air) 2.97 GHz vs 2.75 GHz Around 10% better overclocked clock speed (Air)

Benchmarks Real world tests of Athlon 64 X2 4400+ vs 4000+

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 4000+
78 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-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
4000+ 
Clock speed 2.3 GHz 2.4 GHz
Cores Dual core Single core
Socket type
AM2
939
S1
754

features

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

details

Athlon 64 X2 4400+  vs
4000+ 
Threads 2 1
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.75 GHz 2.97 GHz
Overclocked clock speed (Water) 3.13 GHz 2.9 GHz
PassMark (Overclocked) 1,605.4 1,107.7
Overclocked clock speed (Air) 2.75 GHz 2.97 GHz

power consumption

TDP 65W 89W
Annual home energy cost 15.66 $/year 21.44 $/year
Annual commercial energy cost 56.94 $/year 77.96 $/year
Performance per watt 0.89 pt/W 0.51 pt/W
Typical power consumption 52.81W 72.31W
AMD Athlon 64 X2 4400+
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AMD Athlon 4000+
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