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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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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Front view of Intel Celeron E3400

Reasons to consider the
Intel Celeron E3400

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Much better overclocked clock speed (Air) 3.85 GHz vs 2.67 GHz Around 45% better overclocked clock speed (Air)
Newer Jan, 2010 vs Jan, 2008 Release date over 2 years later

Features Key features of the Core2 Quad Q9450S  vs Celeron E3400 

clock speed

Celeron E3400
2.6 GHz

L2 cache

overclocked clock speed (air)

Celeron E3400
3.85 GHz

overclocked clock speed (water)

Celeron E3400
2.6 GHz

Specifications Full list of technical specs

summary

Core2 Quad Q9450S  vs
Celeron E3400 
Clock speed 2.67 GHz 2.6 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 800 MHz

details

Core2 Quad Q9450S  vs
Celeron E3400 
Threads 4 2
L2 cache 12 MB 1 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.67 GHz 3.85 GHz
Overclocked clock speed (Water) 2.67 GHz 2.6 GHz
Overclocked clock speed (Air) 2.67 GHz 3.85 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 Celeron E3400
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