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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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Higher clock speed 3 GHz vs 2.8 GHz More than 5% higher clock speed
Much better overclocked clock speed (Air) 4.22 GHz vs 3.37 GHz More than 25% better overclocked clock speed (Air)
Much lower typical power consumption 52.81W vs 81.25W 35% lower typical power consumption
Much better overclocked clock speed (Water) 4.23 GHz vs 2.8 GHz More than 50% better overclocked clock speed (Water)
Higher Maximum operating temperature 72.4 °C vs 70.1 °C Around 5% higher Maximum operating temperature
Much lower annual home energy cost 15.66 $/year vs 24.09 $/year 35% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 87.6 $/year 35% lower annual commercial energy cost
Front view of AMD Athlon II X4 641

Reasons to consider the
AMD Athlon II X4 641

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Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Newer Feb, 2012 vs Jan, 2008 Release date over 4 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Athlon II X4 641

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core2 Duo E8400
128,000 MB/s
Athlon II X4 641
116,900 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Athlon II X4 641 
Clock speed 3 GHz 2.8 GHz
Cores Dual core Quad core
Socket type
LGA 775
FM1

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
SSE4.1
AMD-V
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 100W
Annual home energy cost 15.66 $/year 24.09 $/year
Annual commercial energy cost 56.94 $/year 87.6 $/year
Performance per watt 1.83 pt/W 1.4 pt/W
Typical power consumption 52.81W 81.25W

details

Core2 Duo E8400  vs
Athlon II X4 641 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 4 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 32 nm
Transistor count 410,000,000 1,178,000,000
Max CPUs 1 1
Voltage range 0.85 - 1.36V 0.45 - 1.41V
Operating temperature Unknown - 72.4°C Unknown - 70.1°C

overclocking

Overclocked clock speed 4.22 GHz 3.37 GHz
Overclocked clock speed (Water) 4.23 GHz 2.8 GHz
Overclocked clock speed (Air) 4.22 GHz 3.37 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 Core2 Duo E8400
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AMD Athlon II X4 641
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