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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core i7-6700K @ 4.00GHz vs Intel Core i7-7700K @ 4.20GHz vs Intel Core i7-8700K @ 3.70GHz

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


×Intel Core i7-6700K @ 4.00GHz×Intel Core i7-7700K @ 4.20GHz×Intel Core i7-8700K @ 3.70GHz+ ADD
Price$360
BUY NOW!		$440
BUY NOW!		$349
BUY NOW!
Socket TypeLGA1151 LGA 1151FCLGA1151-2
CPU ClassDesktopDesktopDesktop
Clockspeed4.0 GHz4.2 GHz3.7 GHz
Turbo SpeedUp to 4.2 GHzUp to 4.5 GHzUp to 4.7 GHz
# of Physical Cores4 (Threads: 8)4 (Threads: 8)6 (Threads: 12)
Max TDP95W95W95W
Yearly Running Cost$17.34$17.34$17.34
First Seen on ChartQ2 2015Q4 2016Q4 2017
# of Samples14189965411319
Single Thread Rating252327432773
CPU Mark8952968013893

CPU Mark Rating
As of 7th of December 2021 - Higher results represent better performance
Intel Core i7-6700K @ 4.00GHz
 8,952
Intel Core i7-7700K @ 4.20GHz
 9,680
Intel Core i7-8700K @ 3.70GHz
 13,893
PassMark Software © 2008-2021
CPU Value (CPU Mark / $Price)
As of 7th of December 2021 - Higher results represent better value
Intel Core i7-6700K @ 4.00GHz
 24.87
Intel Core i7-7700K @ 4.20GHz
 22.00
Intel Core i7-8700K @ 3.70GHz
 39.81
PassMark Software © 2008-2021
CPU Single Thread Rating
As of 7th of December 2021 - Higher results represent better performance
Intel Core i7-6700K @ 4.00GHz
 2,523
Intel Core i7-7700K @ 4.20GHz
 2,743
Intel Core i7-8700K @ 3.70GHz
 2,773
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 Core i7-6700K @ 4.00GHzIntel Core i7-7700K @ 4.20GHzIntel Core i7-8700K @ 3.70GHz
Max TDP95W95W95W
Power consumption per day (kWh)NANANA
Running cost per dayNANANA
Power consumption per year (kWh)NANANA
Running cost per yearNANANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.