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Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much newer manufacturing process 45 nm vs 130 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3 GHz vs 2.1 GHz Around 45% higher clock speed
Much better PassMark score 2,160 vs 365 Around 6x better PassMark score
Much better PassMark (Single core) score 1,251 vs 561 Around 2.2x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.22 GHz vs 2.47 GHz More than 70% better overclocked clock speed (Air)
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much better overclocked clock speed (Water) 4.23 GHz vs 2.74 GHz Around 55% better overclocked clock speed (Water)
Front view of AMD Athlon XP 3000+

Reasons to consider the
AMD Athlon XP 3000+

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CPUBoss is not aware of any important advantages of the AMD Athlon XP 3000+ vs the Intel Core2 Duo E8400.

Benchmarks Real world tests of Core2 Duo E8400 vs Athlon XP 3000+

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Athlon XP 3000+ 
Clock speed 3 GHz 2.1 GHz
Cores Dual core Single core
Socket type
LGA 775
462

features

Has a NX bit Yes No
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3

bus

Clock speed 1,333 MHz 400 MHz

details

Core2 Duo E8400  vs
Athlon XP 3000+ 
Threads 2 1
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 130 nm
Max CPUs 1 1

overclocking

Overclock popularity 125 1
Overclock review score 4.5 0
Overclocked clock speed 4.22 GHz 2.47 GHz
Overclocked clock speed (Water) 4.23 GHz 2.74 GHz
Overclocked clock speed (Air) 4.22 GHz 2.47 GHz

power consumption

Typical power consumption 52.81W N/A
Intel Core2 Duo E8400
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AMD Athlon XP 3000+
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