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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9450S

Reasons to consider the
Intel Core2 Quad Q9450S

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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
Front view of Intel Core2 Duo E8500

Reasons to consider the
Intel Core2 Duo E8500

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Significantly higher clock speed 3.16 GHz vs 2.67 GHz Around 20% higher clock speed
Much better overclocked clock speed (Air) 4.46 GHz vs 2.67 GHz More than 65% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.42 GHz vs 2.67 GHz More than 65% better overclocked clock speed (Water)

Features Key features of the Core2 Quad Q9450S  vs Duo E8500 

clock speed

L2 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core2 Quad Q9450S  vs
Duo E8500 
Clock speed 2.67 GHz 3.16 GHz
Cores Quad core Dual core
Socket type
LGA 775

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

bus

Clock speed 1,333 MHz 1,333 MHz

details

Core2 Quad Q9450S  vs
Duo E8500 
Threads 4 2
L2 cache 12 MB 6 MB
L2 cache per core 3 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.67 GHz 4.46 GHz
Overclocked clock speed (Water) 2.67 GHz 4.42 GHz
Overclocked clock speed (Air) 2.67 GHz 4.46 GHz

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
Typical power consumption 52.81W 52.81W
Intel Core2 Quad Q9450S
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Intel Core2 Duo E8500
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