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Differences What are the advantages of each

Front view of Intel Pentium 4 506

Reasons to consider the
Intel Pentium 4 506

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Significantly higher clock speed 2.66 GHz vs 2.3 GHz More than 15% higher clock speed
Much better overclocked clock speed (Air) 3.85 GHz vs 2.75 GHz More than 40% better overclocked clock speed (Air)
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
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
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Significantly lower typical power consumption 52.81W vs 68.25W Around 25% lower typical power consumption
Significantly better overclocked clock speed (Water) 3.13 GHz vs 2.67 GHz More than 15% better overclocked clock speed (Water)
Significantly lower annual home energy cost 15.66 $/year vs 20.24 $/year Around 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 73.58 $/year Around 25% lower annual commercial energy cost

Benchmarks Real world tests of Pentium 4 506 vs Athlon 64 X2 4400+

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

Pentium 4 506
95,500 MB/s
Athlon 64 X2 4400+
85.5 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

Specifications Full list of technical specs

summary

Pentium 4 506  vs
Athlon 64 X2 4400+ 
Clock speed 2.66 GHz 2.3 GHz
Cores Single core Dual core
Socket type
LGA 775
AM2
939

features

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

details

Pentium 4 506  vs
Athlon 64 X2 4400+ 
Threads 1 2
L2 cache 1 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.85 GHz 2.75 GHz
Overclocked clock speed (Water) 2.67 GHz 3.13 GHz
Overclocked clock speed (Air) 3.85 GHz 2.75 GHz

power consumption

TDP 84W 65W
Annual home energy cost 20.24 $/year 15.66 $/year
Annual commercial energy cost 73.58 $/year 56.94 $/year
Performance per watt 0.93 pt/W 0.89 pt/W
Typical power consumption 68.25W 52.81W
Intel Pentium 4 506
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AMD Athlon 64 X2 4400+
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