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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core i5-661 @ 3.33GHz vs Intel Core2 Quad Q8400 @ 2.66GHz

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

×Intel Core i5-661 @ 3.33GHz×Intel Core2 Quad Q8400 @ 2.66GHz+ ADD
Price$229.991$128.881
Socket TypeLGA1156LGA775
CPU ClassDesktopDesktop
Clockspeed3.3 GHz2.7 GHz
Turbo SpeedUp to 3.6 GHzNot Supported
# of Physical Cores2 (Threads: 4)4 (Threads: 4)
Max TDP87W95W
Yearly Running Cost$15.88$17.34
First Seen on ChartQ1 2010Q2 2009
# of Samples1601471
Cross-Platform Rating50604727
Single Thread Rating14461151
CPU Mark24102012
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 7th of March 2021 - Higher results represent better performance
Intel Core i5-661 @ 3.33GHz
2,410
Intel Core2 Quad Q8400 @ 2.66GHz
2,012
CPU Value (CPU Mark / $Price)
As of 7th of March 2021 - Higher results represent better value
Intel Core i5-661 @ 3.33GHz
10.48
Intel Core2 Quad Q8400 @ 2.66GHz
15.61
CPU Single Thread Rating
As of 7th of March 2021 - Higher results represent better performance
Intel Core i5-661 @ 3.33GHz
1,446
Intel Core2 Quad Q8400 @ 2.66GHz
1,151

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 Core i5-661 @ 3.33GHzIntel Core2 Quad Q8400 @ 2.66GHz
Max TDP87W95W
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.