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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9505S

Reasons to consider the
Intel Core2 Quad Q9505S

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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
Significantly higher Maximum operating temperature 76.3 °C vs 72.4 °C More than 5% higher Maximum operating temperature
Newer Jul, 2009 vs Jan, 2008 Release date over 1 years later
Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much better overclocked clock speed (Air) 4.22 GHz vs 2.83 GHz Around 50% better overclocked clock speed (Air)
Higher clock speed 3 GHz vs 2.83 GHz More than 5% higher clock speed
Much better overclocked clock speed (Water) 4.23 GHz vs 2.83 GHz Around 50% better overclocked clock speed (Water)

Features Key features of the Core2 Quad Q9505S  vs Duo E8400 

clock speed

L2 cache

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core2 Quad Q9505S  vs
Duo E8400 
Clock speed 2.83 GHz 3 GHz
Cores Quad core Dual core
Socket type
LGA 775

features

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

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

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,333 MHz

details

Core2 Quad Q9505S  vs
Duo E8400 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 6 MB 6 MB
L2 cache per core 1.5 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Transistor count 456,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 8 9
Voltage range 0.85 - 1.36V 0.85 - 1.36V
Operating temperature Unknown - 76.3°C Unknown - 72.4°C

overclocking

Overclocked clock speed 2.83 GHz 4.22 GHz
Overclocked clock speed (Water) 2.83 GHz 4.23 GHz
Overclocked clock speed (Air) 2.83 GHz 4.22 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 Quad Q9505S
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Intel Core2 Duo E8400
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