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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
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Much lower typical power consumption 52.81W vs 93.6W Around 45% lower typical power consumption
Much lower annual home energy cost 15.66 $/year vs 27.75 $/year Around 45% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 100.92 $/year Around 45% lower annual commercial energy cost
Front view of Intel Core i5 2400

Reasons to consider the
Intel Core i5 2400

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Significantly higher clock speed 3.1 GHz vs 2.67 GHz More than 15% higher clock speed
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Air) 3.54 GHz vs 2.67 GHz Around 35% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 3.51 GHz vs 2.67 GHz More than 30% better overclocked clock speed (Water)
Newer Jan, 2011 vs Jan, 2008 Release date over 3 years later

Features Key features of the Core2 Quad Q9450S  vs Core i5 2400 

clock speed

Core i5 2400
3.1 GHz

L2 cache

overclocked clock speed (air)

Core i5 2400
3.54 GHz

overclocked clock speed (water)

Core i5 2400
3.51 GHz

Specifications Full list of technical specs

summary

Core2 Quad Q9450S  vs
Core i5 2400 
Clock speed 2.67 GHz 3.1 GHz
Cores Quad core Quad core
Socket type
LGA 775
LGA 1155

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Core2 Quad Q9450S  vs
Core i5 2400 
Threads 4 4
L2 cache 12 MB 1 MB
L2 cache per core 3 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.67 GHz 3.54 GHz
Overclocked clock speed (Water) 2.67 GHz 3.51 GHz
Overclocked clock speed (Air) 2.67 GHz 3.54 GHz

power consumption

TDP 65W 95W
Annual home energy cost 15.66 $/year 27.75 $/year
Annual commercial energy cost 56.94 $/year 100.92 $/year
Typical power consumption 52.81W 93.6W
Intel Core2 Quad Q9450S
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Intel Core i5 2400
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