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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q8400 @ 2.66GHz vs Intel Core2 Quad Q6600 @ 2.40GHz vs Intel Core2 Duo E8400 @ 3.00GHz

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

×Intel Core2 Quad Q8400 @ 2.66GHz×Intel Core2 Quad Q6600 @ 2.40GHz×Intel Core2 Duo E8400 @ 3.00GHz
Price$239.951$39.981$45.51
Socket TypeLGA775LGA775LGA775
CPU ClassDesktopDesktopDesktop
Clockspeed2.7 GHz2.4 GHz3.0 GHz
Turbo SpeedNot SupportedNot SupportedNot Supported
# of Physical Cores442
Max TDP95W105W65W
Yearly Running Cost$17.34$19.16$11.86
First Seen on ChartQ2 2009Q4 2008Q4 2008
# of Samples139569736621
Single Thread Rating11209241247
CPU Mark316129462147

CPU Mark Rating
As of 19th of February 2020 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
3,161
Intel Core2 Quad Q6600 @ 2.40GHz
2,946
Intel Core2 Duo E8400 @ 3.00GHz
2,147
CPU Value (CPU Mark / $Price)
As of 19th of February 2020 - Higher results represent better value
Intel Core2 Quad Q8400 @ 2.66GHz
13.18
Intel Core2 Quad Q6600 @ 2.40GHz
73.70
Intel Core2 Duo E8400 @ 3.00GHz
47.20
CPU Single Thread Rating
As of 19th of February 2020 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
1,120
Intel Core2 Quad Q6600 @ 2.40GHz
924
Intel Core2 Duo E8400 @ 3.00GHz
1,247

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 @ 2.66GHzIntel Core2 Quad Q6600 @ 2.40GHzIntel Core2 Duo E8400 @ 3.00GHz
Max TDP95W105W65W
Power consumption per day (kWh)abcabcabc
Running cost per dayabcabcabc
Power consumption per year (kWh)abcabcabc
Running cost per yearabcabcabc
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.