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Differences What are the advantages of each

Front view of AMD Athlon X2 6400+

Reasons to consider the
AMD Athlon X2 6400+

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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
Significantly higher clock speed 3.2 GHz vs 2.7 GHz Around 20% higher clock speed
Much better PassMark score 1,795 vs 1,383 Around 30% better PassMark score
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Better overclocked clock speed (Water) 3.53 GHz vs 3.38 GHz Around 5% better overclocked clock speed (Water)
Front view of AMD Athlon X2 5200+

Reasons to consider the
AMD Athlon X2 5200+

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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
Much lower typical power consumption 52.81W vs 101.56W Around 50% lower typical power consumption
Much higher Maximum operating temperature 68 °C vs 55 °C Around 25% higher Maximum operating temperature
Significantly better overclocked clock speed (Air) 3.61 GHz vs 3.42 GHz More than 5% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 30.11 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 109.5 $/year Around 50% lower annual commercial energy cost

Benchmarks Real world tests of Athlon X2 6400+ vs 5200+

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 X2 6400+
87.5 MB/s
Athlon X2 5200+
54.2 MB/s

3D Mark 11 (Physics)

Cinebench R10 32-Bit

sysmark 2007 (overall)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon X2 6400+  vs
5200+ 
Clock speed 3.2 GHz 2.7 GHz
Cores Dual core Dual core
Socket type
AM2
AM3
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

power consumption

TDP 125W 65W
Annual home energy cost 30.11 $/year 15.66 $/year
Annual commercial energy cost 109.5 $/year 56.94 $/year
Performance per watt 0.56 pt/W 0.78 pt/W
Typical power consumption 101.56W 52.81W

details

Athlon X2 6400+  vs
5200+ 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
L3 cache 0 MB 0 MB
L3 cache per core 0 MB/core 0 MB/core
Manufacture process 90 nm 65 nm
Max CPUs 1 1
Voltage range 1.35 - 1.4V 0.95 - 1.4V
Operating temperature Unknown - 55°C 55 - 68°C

overclocking

Overclocked clock speed 3.42 GHz 3.61 GHz
Overclocked clock speed (Water) 3.53 GHz 3.38 GHz
PassMark (Overclocked) 1,625.2 1,603.5
Overclocked clock speed (Air) 3.42 GHz 3.61 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A
AMD Athlon X2 6400+
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AMD Athlon X2 5200+
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