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Differences What are the advantages of each

Front view of Intel Core2 Quad Q6600

Reasons to consider the
Intel Core2 Quad Q6600

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Much more l2 cache 8 MB vs 2 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 2 MB/core vs 1 MB/core 2x more l2 cache per core
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 3.6 GHz vs 2.8 GHz Around 30% better overclocked clock speed (Water)
Front view of AMD Athlon II XLT V66C

Reasons to consider the
AMD Athlon II XLT V66C

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Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.8 GHz vs 2.4 GHz More than 15% higher clock speed
Much lower typical power consumption 36.56W vs 85.31W 2.3x lower typical power consumption
Newer Apr, 2010 vs Jan, 2007 Release date over 3 years later
Much lower annual home energy cost 10.84 $/year vs 25.29 $/year 2.3x lower annual home energy cost
Much lower annual commercial energy cost 39.42 $/year vs 91.98 $/year 2.3x lower annual commercial energy cost
Better overclocked clock speed (Air) 3.83 GHz vs 3.52 GHz Around 10% better overclocked clock speed (Air)

Features Key features of the Core2 Quad Q6600  vs Athlon II XLT V66C 

clock speed

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core2 Quad Q6600  vs
Athlon II XLT V66C 
Clock speed 2.4 GHz 2.8 GHz
Cores Quad core Dual 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
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

bus

Clock speed 1,066 MHz 2,000 MHz

details

Core2 Quad Q6600  vs
Athlon II XLT V66C 
Threads 4 2
L2 cache 8 MB 2 MB
L2 cache per core 2 MB/core 1 MB/core
Manufacture process 65 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.52 GHz 3.83 GHz
Overclocked clock speed (Water) 3.6 GHz 2.8 GHz
Overclocked clock speed (Air) 3.52 GHz 3.83 GHz

power consumption

TDP 105W 45W
Annual home energy cost 25.29 $/year 10.84 $/year
Annual commercial energy cost 91.98 $/year 39.42 $/year
Typical power consumption 85.31W 36.56W
Intel Core2 Quad Q6600
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AMD Athlon II XLT V66C
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