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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core i5-8400 @ 2.80GHz vs Intel Core i5-6600K @ 3.50GHz

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


×Intel Core i5-8400 @ 2.80GHz×Intel Core i5-6600K @ 3.50GHz+ ADD
Price$192.5
BUY NOW!		$354.71
Socket TypeFCLGA1151-2FCLGA1151
CPU ClassDesktopDesktop
Clockspeed2.8 GHz3.5 GHz
Turbo SpeedUp to 4.0 GHzUp to 3.9 GHz
# of Physical Cores6 (Threads: 6)4 (Threads: 4)
Max TDP65W91W
Yearly Running Cost$11.86$16.61
First Seen on ChartQ4 2017Q2 2015
# of Samples39055478
Cross-Platform Rating1742212273
Single Thread Rating24162326
CPU Mark92006255
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 6th of November 2020 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
 9,200
Intel Core i5-6600K @ 3.50GHz
 6,255
PassMark Software © 2008-2020
CPU Value (CPU Mark / $Price)
As of 6th of November 2020 - Higher results represent better value
Intel Core i5-8400 @ 2.80GHz
 47.79
Intel Core i5-6600K @ 3.50GHz
 17.63
PassMark Software © 2008-2020
CPU Single Thread Rating
As of 6th of November 2020 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
 2,416
Intel Core i5-6600K @ 3.50GHz
 2,326
PassMark Software © 2008-2020

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 i5-8400 @ 2.80GHzIntel Core i5-6600K @ 3.50GHz
Max TDP65W91W
Power consumption per day (kWh)abcabc
Running cost per dayabcabc
Power consumption per year (kWh)abcabc
Running cost per yearabcabc
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.