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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q9400 @ 2.66GHz vs AMD Phenom II X4 955

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


×Intel Core2 Quad Q9400 @ 2.66GHz×AMD Phenom II X4 955+ ADD
Price$38.011$176.181
Socket TypeLGA775AM3
CPU ClassDesktopDesktop
Clockspeed2.7 GHz3.2 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
Max TDP95W125W
Yearly Running Cost$17.34$22.81
First Seen on ChartQ4 2008Q1 2009
# of Samples23283849
Single Thread Rating(% diff. to max in group)1140(-12.5%)1303(0.0%)
CPU Mark(% diff. to max in group)2073(-14.9%)2436(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 5th of July 2022 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
 2,073
AMD Phenom II X4 955
 2,436
PassMark Software © 2008-2022
CPU Value (CPU Mark / $Price)
As of 5th of July 2022 - Higher results represent better value
Intel Core2 Quad Q9400 @ 2.66GHz
 54.54
AMD Phenom II X4 955
 13.83
PassMark Software © 2008-2022
CPU Single Thread Rating
As of 5th of July 2022 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
 1,140
AMD Phenom II X4 955
 1,303
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 @ 2.66GHzAMD Phenom II X4 955
Max TDP95W125W
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.