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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 higher clock speed 3 GHz vs 1.6 GHz More than 85% higher clock speed
Much more l2 cache 6 MB vs 1 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 4.22 GHz vs 1.6 GHz Around 2.8x better overclocked clock speed (Air)
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
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 1.6 GHz Around 2.8x better overclocked clock speed (Water)
Front view of AMD Athlon 64 X2 3000+

Reasons to consider the
AMD Athlon 64 X2 3000+

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Much higher Maximum operating temperature 95 °C vs 72.4 °C More than 30% higher Maximum operating temperature
Much lower typical power consumption 16.25W vs 52.81W 3.2x lower typical power consumption
Much lower annual home energy cost 4.82 $/year vs 15.66 $/year 3.2x lower annual home energy cost
Much lower annual commercial energy cost 17.52 $/year vs 56.94 $/year 3.3x lower annual commercial energy cost

Features Key features of the Core2 Duo E8400  vs Athlon 64 X2 3000+ 

clock speed

L2 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Athlon 64 X2 3000+ 
Clock speed 3 GHz 1.6 GHz
Cores Dual core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3

details

Core2 Duo E8400  vs
Athlon 64 X2 3000+ 
Threads 2 2
L2 cache 6 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 1
Operating temperature Unknown - 72.4°C Unknown - 95°C

overclocking

Overclocked clock speed 4.22 GHz 1.6 GHz
Overclocked clock speed (Water) 4.23 GHz 1.6 GHz
Overclocked clock speed (Air) 4.22 GHz 1.6 GHz

power consumption

TDP 65W 20W
Annual home energy cost 15.66 $/year 4.82 $/year
Annual commercial energy cost 56.94 $/year 17.52 $/year
Typical power consumption 52.81W 16.25W
Intel Core2 Duo E8400
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AMD Athlon 64 X2 3000+
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