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Differences What are the advantages of each

Front view of AMD Athlon X2 4200+

Reasons to consider the
AMD Athlon X2 4200+

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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
Significantly better overclocked clock speed (Water) 2.9 GHz vs 2.4 GHz More than 20% better overclocked clock speed (Water)
Newer May, 2005 vs Jun, 2004 Release date a year later
Front view of AMD Athlon 3800+

Reasons to consider the
AMD Athlon 3800+

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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
Higher clock speed 2.4 GHz vs 2.2 GHz Around 10% higher clock speed
Much lower typical power consumption 36.56W vs 72.31W Around 50% lower typical power consumption
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much higher Maximum operating temperature 55 °C vs 49 °C More than 10% higher Maximum operating temperature
Better overclocked clock speed (Air) 2.8 GHz vs 2.65 GHz More than 5% better overclocked clock speed (Air)
Much lower annual commercial energy cost 39.42 $/year vs 77.96 $/year Around 50% lower annual commercial energy cost
Much lower annual home energy cost 10.84 $/year vs 21.44 $/year Around 50% lower annual home energy cost

Benchmarks Real world tests of Athlon X2 4200+ vs 3800+

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 4200+
59.9 MB/s
Athlon 3800+
64.55 MB/s

Specifications Full list of technical specs

summary

Athlon X2 4200+  vs
3800+ 
Clock speed 2.2 GHz 2.4 GHz
Cores Dual core Single core
Socket type
AM2
939
Is unlocked No No

features

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

power consumption

TDP 89W 45W
Annual home energy cost 21.44 $/year 10.84 $/year
Annual commercial energy cost 77.96 $/year 39.42 $/year
Performance per watt 0.52 pt/W 0.73 pt/W
Typical power consumption 72.31W 36.56W

details

Athlon X2 4200+  vs
3800+ 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 1 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
Operating temperature Unknown - 49°C Unknown - 55°C

overclocking

Overclocked clock speed 2.65 GHz 2.8 GHz
Overclocked clock speed (Water) 2.9 GHz 2.4 GHz
Overclocked clock speed (Air) 2.65 GHz 2.8 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 4200+
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AMD Athlon 3800+
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