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Differences What are the advantages of each

Front view of Intel Pentium 4 520J

Reasons to consider the
Intel Pentium 4 520J

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Much higher clock speed 2.8 GHz vs 1.6 GHz Around 75% higher clock speed
Much more l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 3.77 GHz vs 2.36 GHz Around 60% better overclocked clock speed (Air)
More threads 2 vs 1 Twice as many threads
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much better overclocked clock speed (Water) 4.16 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Water)
Front view of AMD Sempron 2800+

Reasons to consider the
AMD Sempron 2800+

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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
Significantly lower typical power consumption 50.38W vs 68.25W More than 25% lower typical power consumption
Higher Maximum operating temperature 70 °C vs 67.7 °C Around 5% higher Maximum operating temperature
Significantly lower annual home energy cost 14.94 $/year vs 20.24 $/year More than 25% lower annual home energy cost
Significantly lower annual commercial energy cost 54.31 $/year vs 73.58 $/year More than 25% lower annual commercial energy cost

Features Key features of the Pentium 4 520J  vs Sempron 2800+ 

clock speed

Pentium 4 520J
2.8 GHz
Sempron 2800+
1.6 GHz

L2 cache

overclocked clock speed (air)

Pentium 4 520J
3.77 GHz
Sempron 2800+
2.36 GHz

overclocked clock speed (water)

Pentium 4 520J
4.16 GHz
Sempron 2800+
1.8 GHz

Specifications Full list of technical specs

summary

Pentium 4 520J  vs
Sempron 2800+ 
Clock speed 2.8 GHz 1.6 GHz
Cores Single core Single core
Socket type
LGA 775
754
AM2
462

features

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

power consumption

TDP 84W 62W
Annual home energy cost 20.24 $/year 14.94 $/year
Annual commercial energy cost 73.58 $/year 54.31 $/year
Typical power consumption 68.25W 50.38W

bus

Clock speed 800 MHz 200 MHz

details

Pentium 4 520J  vs
Sempron 2800+ 
Architecture x86 x86
Threads 2 1
L2 cache 1 MB 0.5 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 90 nm
Max CPUs 1 1
Operating temperature Unknown - 67.7°C Unknown - 70°C

overclocking

Overclocked clock speed 3.77 GHz 2.36 GHz
Overclocked clock speed (Water) 4.16 GHz 1.8 GHz
PassMark (Overclocked) 579.4 543.6
Overclocked clock speed (Air) 3.77 GHz 2.36 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 520J
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AMD Sempron 2800+
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