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Differences What are the advantages of each

Front view of Intel Pentium 4 640

Reasons to consider the
Intel Pentium 4 640

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Much higher clock speed 3.2 GHz vs 2.4 GHz Around 35% higher clock speed
More threads 2 vs 1 Twice as many threads
Much better overclocked clock speed (Air) 3.92 GHz vs 2.8 GHz More than 40% better overclocked clock speed (Air)
Much higher Maximum operating temperature 66.6 °C vs 55 °C More than 20% higher Maximum operating temperature
Much better overclocked clock speed (Water) 3.2 GHz vs 2.4 GHz Around 35% better overclocked clock speed (Water)
Front view of AMD Athlon 3800+

Reasons to consider the
AMD Athlon 3800+

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines

Features Key features of the Pentium 4 640  vs Athlon 3800+ 

clock speed

Pentium 4 640
3.2 GHz
Athlon 3800+
2.4 GHz

L2 cache

overclocked clock speed (air)

Pentium 4 640
3.92 GHz
Athlon 3800+
2.8 GHz

overclocked clock speed (water)

Pentium 4 640
3.2 GHz
Athlon 3800+
2.4 GHz

Specifications Full list of technical specs

summary

Pentium 4 640  vs
Athlon 3800+ 
Clock speed 3.2 GHz 2.4 GHz
Cores Single core Single core
Socket type
LGA 775
939
AM2

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 84W 45W
Annual home energy cost 20.24 $/year 10.84 $/year
Annual commercial energy cost 73.58 $/year 39.42 $/year
Typical power consumption 68.25W 36.56W

details

Pentium 4 640  vs
Athlon 3800+ 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 2 MB 1 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 90 nm 65 nm
Max CPUs 1 1
Operating temperature Unknown - 66.6°C Unknown - 55°C

overclocking

Overclocked clock speed 3.92 GHz 2.8 GHz
Overclocked clock speed (Water) 3.2 GHz 2.4 GHz
Overclocked clock speed (Air) 3.92 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
Intel Pentium 4 640
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AMD Athlon 3800+
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