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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 2.1 GHz Around 45% higher clock speed
Much better PassMark (Single core) score 1,251 vs 759 Around 65% better PassMark (Single core) score
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 4.22 GHz vs 2.51 GHz Around 70% better overclocked clock speed (Air)
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 2.1 GHz More than 2x better overclocked clock speed (Water)
Higher Maximum operating temperature 72.4 °C vs 70 °C Around 5% higher Maximum operating temperature
Front view of AMD Phenom X4 9450e

Reasons to consider the
AMD Phenom X4 9450e

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More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads

Benchmarks Real world tests of Core2 Duo E8400 vs Phenom X4 9450e

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Phenom X4 9450e 
Clock speed 3 GHz 2.1 GHz
Cores Dual core Quad core
Socket type
LGA 775
AM2+

features

Has a NX bit 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

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 1.83 pt/W 1.48 pt/W
Typical power consumption 52.81W 52.81W

details

Core2 Duo E8400  vs
Phenom X4 9450e 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 2 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 - 70°C

overclocking

Overclocked clock speed 4.22 GHz 2.51 GHz
Overclocked clock speed (Water) 4.23 GHz 2.1 GHz
Overclocked clock speed (Air) 4.22 GHz 2.51 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

bus

Clock speed 1,333 MHz 1,800 MHz
Intel Core2 Duo E8400
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AMD Phenom X4 9450e
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