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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 2.3 GHz More than 30% higher clock speed
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Higher Maximum operating temperature 72.4 °C vs 70 °C Around 5% higher Maximum operating temperature
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost
Front view of AMD Phenom X3 8600B

Reasons to consider the
AMD Phenom X3 8600B

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More cores 3 vs 2 1 more cores; run more applications at once
More threads 3 vs 2 1 more threads

Features Key features of the Core2 Duo E8400  vs Phenom X3 8600B 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Phenom X3 8600B 
Clock speed 3 GHz 2.3 GHz
Cores Dual core Tri core
Socket type
LGA 775
AM2+

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

bus

Clock speed 1,333 MHz 1,800 MHz

details

Core2 Duo E8400  vs
Phenom X3 8600B 
Architecture x86-64 x86-64
Threads 2 3
L2 cache 6 MB 2 MB
L2 cache per core 3 MB/core 0.67 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 1 1
Operating temperature Unknown - 72.4°C Unknown - 70°C

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

power consumption

TDP 65W 95W
Annual home energy cost 15.66 $/year 22.89 $/year
Annual commercial energy cost 56.94 $/year 83.22 $/year
Typical power consumption 52.81W 77.19W
Intel Core2 Duo E8400
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AMD Phenom X3 8600B
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