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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q9400 @ 2.66GHz vs Intel Core2 Quad Q9550 @ 2.83GHz

The values for the CPUs below are determined from thousands of PerformanceTest benchmark results and are updated daily.


×Intel Core2 Quad Q9400 @ 2.66GHz×Intel Core2 Quad Q9550 @ 2.83GHz+ ADD
Price$38.011$29.98
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Socket TypeLGA775LGA775
CPU ClassDesktopDesktop
Clockspeed2.7 GHz2.8 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
Max TDP95W95W
Yearly Running Cost$17.34$17.34
First Seen on ChartQ4 2008Q4 2008
# of Samples23283863
Single Thread Rating(% diff. to max in group)1140(-6.7%)1222(0.0%)
CPU Mark(% diff. to max in group)2073(-9.5%)2291(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 3rd of July 2022 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
 2,073
Intel Core2 Quad Q9550 @ 2.83GHz
 2,291
PassMark Software © 2008-2022
CPU Value (CPU Mark / $Price)
As of 3rd of July 2022 - Higher results represent better value
Intel Core2 Quad Q9400 @ 2.66GHz
 54.54
Intel Core2 Quad Q9550 @ 2.83GHz
 76.42
PassMark Software © 2008-2022
CPU Single Thread Rating
As of 3rd of July 2022 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
 1,140
Intel Core2 Quad Q9550 @ 2.83GHz
 1,222
PassMark Software © 2008-2022

Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per dayAverage CPU Utilization (0-100%)1Power cost, $ per kWh2
1Average user usage is typically low and can vary from task to task. An estimate load 25% is nominal.
2Typical power costs vary around the world. Check your last power bill for details. Values of $0.15 to $0.45 per kWh are typical.
Intel Core2 Quad Q9400 @ 2.66GHzIntel Core2 Quad Q9550 @ 2.83GHz
Max TDP95W95W
Power consumption per day (kWh)NANA
Running cost per dayNANA
Power consumption per year (kWh)NANA
Running cost per yearNANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.