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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 lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much better overclocked clock speed (Air) 4.22 GHz vs 3.72 GHz Around 15% better overclocked clock speed (Air)
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
Better overclocked clock speed (Water) 4.23 GHz vs 3.88 GHz Around 10% better overclocked clock speed (Water)
Front view of AMD Athlon II X3 445

Reasons to consider the
AMD Athlon II X3 445

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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
Higher clock speed 3.1 GHz vs 3 GHz Around 5% higher clock speed
Higher Maximum operating temperature 75 °C vs 72.4 °C Around 5% higher Maximum operating temperature
Newer May, 2010 vs Jan, 2008 Release date over 2 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Athlon II X3 445

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 X3 445
125,450 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Athlon II X3 445 
Clock speed 3 GHz 3.1 GHz
Cores Dual core Tri core
Socket type
LGA 775
AM3

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 95W
Annual home energy cost 15.66 $/year 22.89 $/year
Annual commercial energy cost 56.94 $/year 83.22 $/year
Performance per watt 1.83 pt/W 1.42 pt/W
Typical power consumption 52.81W 77.19W

bus

Clock speed 1,333 MHz 2,000 MHz

details

Core2 Duo E8400  vs
Athlon II X3 445 
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 45 nm
Max CPUs 1 1
Voltage range 0.85 - 1.36V 0.85 - 1.4V
Operating temperature Unknown - 72.4°C Unknown - 75°C

overclocking

Overclock popularity 125 22
Overclocked clock speed 4.22 GHz 3.72 GHz
Overclocked clock speed (Water) 4.23 GHz 3.88 GHz
Overclocked clock speed (Air) 4.22 GHz 3.72 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 X3 445
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