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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q8400 @ 2.66GHz vs AMD Phenom II X4 945

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


×Intel Core2 Quad Q8400 @ 2.66GHz×AMD Phenom II X4 945+ ADD
Price$128.881$54.95
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Socket TypeLGA775AM3
CPU ClassDesktopDesktop
Clockspeed2.7 GHz3.0 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 ChartQ2 2009Q2 2009
# of Samples14691507
Cross-Platform Rating47355446
Single Thread Rating11511233
CPU Mark20112230
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 1st of March 2021 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
 2,011
AMD Phenom II X4 945
 2,230
PassMark Software © 2008-2021
CPU Value (CPU Mark / $Price)
As of 1st of March 2021 - Higher results represent better value
Intel Core2 Quad Q8400 @ 2.66GHz
 15.61
AMD Phenom II X4 945
 40.58
PassMark Software © 2008-2021
CPU Single Thread Rating
As of 1st of March 2021 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
 1,151
AMD Phenom II X4 945
 1,233
PassMark Software © 2008-2021

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 Q8400 @ 2.66GHzAMD Phenom II X4 945
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.