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Intel Core2 Quad Q9550

Front view of Intel Core2 Quad Q9550
Front view of Intel Core2 Duo E8400

Intel Core2 Duo E8400

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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9550

Reasons to consider the
Intel Core2 Quad Q9550

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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 E8400

Reasons to consider the
Intel Core2 Duo E8400

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Higher clock speed 3 GHz vs 2.83 GHz More than 5% higher clock speed
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Significantly better overclocked clock speed (Air) 4.22 GHz vs 3.99 GHz More than 5% better overclocked clock speed (Air)
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost
Higher Maximum operating temperature 72.4 °C vs 71.4 °C Almost the same
Better overclocked clock speed (Water) 4.23 GHz vs 4.03 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Core2 Quad Q9550 vs Duo E8400

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core2 Quad Q9550
5,498
Core2 Duo E8400
2,982

GeekBench 3 (Single core) Data courtesy Primate Labs

Core2 Quad Q9550
1,604
Core2 Duo E8400
1,625

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core2 Quad Q9550
121,500 MB/s
Core2 Duo E8400
128,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core2 Quad Q9550
5,132
Core2 Duo E8400
2,826

GeekBench (64-bit) Data courtesy Primate Labs

Core2 Quad Q9550
5,686
Core2 Duo E8400
3,092

GeekBench

Core2 Quad Q9550
7,065
Core2 Duo E8400
4,794

PassMark Data courtesy Passmark

Core2 Quad Q9550
4,002
Core2 Duo E8400
2,160

PassMark (Single Core)

Core2 Quad Q9550
1,199
Core2 Duo E8400
1,251

Reviews Word on the street

Core2 Quad Q9550  vs Duo E8400 
9.8
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9.1
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Specifications Full list of technical specs

summary

 Core2 Quad Q9550  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
SSE4
SSE3
EM64T
SSE
SSE4.1
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

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

details

 Core2 Quad Q9550  vs
Duo E8400 
Architecture x86-64 x86-64
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
Transistor count 820,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 8 9
Voltage range 0.85 - 1.36V 0.85 - 1.36V
Operating temperature Unknown - 71.4°C Unknown - 72.4°C

overclocking
Overclock popularity 127 125
Overclock review score 5 4.5
Overclocked clock speed 3.99 GHz 4.22 GHz
Overclocked clock speed (Water) 4.03 GHz 4.23 GHz
Overclocked clock speed (Air) 3.99 GHz 4.22 GHz

power consumption
TDP 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Performance per watt 1.51 pt/W 1.83 pt/W
Typical power consumption 77.19W 52.81W

bus
Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,333 MHz
Intel Core2 Quad Q9550
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Intel Core2 Duo E8400
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