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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i5-6600K vs i7-6700K

The Intel Core i5-6600K @ 3.50GHz is newer than Intel Core i7-6700K @ 4.00GHz and is around -30% slower in multi-threaded (CPU Mark) testing. The Intel Core i5-6600K @ 3.50GHz is around -7% slower in single-thread testing. Both CPUs operates at simliar power levels (TDP). All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 25354 benchmarks submitted from our PerformanceTest software and results and are updated daily to include new submissions.

  • The first section will show basic information for each CPU selected.
  • The additional graphs shows the CPU Mark and Single Thread values of each CPU selected.
  • An accompany graph, if price data is available, will shows the value for money, in terms of the CPU Mark/Thread Rating per dollar.
  • The last section will show approximate yearly running costs for the CPUs.

×Intel Core i5-6600K @ 3.50GHz×Intel Core i7-6700K @ 4.00GHz+ ADD
Price $107.36 - BUY $139 - BUY
Socket TypeFCLGA1151LGA1151
CPU ClassDesktopDesktop
Clockspeed3.5 GHz4.0 GHz
Turbo SpeedUp to 3.9 GHzUp to 4.2 GHz
# of Physical Cores4 (Threads: 4)4 (Threads: 8)
CacheL1: 256KB, L2: 1.0MB, L3: 6MBL1: 256KB, L2: 1.0MB, L3: 8MB
TDP91W95W
Yearly Running Cost$16.61$17.34
Other
First Seen on ChartQ3 2015Q3 2015
# of Samples704418310
CPU Value58.764.3
Single Thread Rating(% diff. to max in group)2314(-7.4%)2498(0.0%)
CPU Mark(% diff. to max in group)6298(-29.5%)8933(0.0%)

CPU Mark Rating
As of 9th of December 2025 - Higher results represent better performance
Intel Core i5-6600K @ 3.50GHz
6,298
Intel Core i7-6700K @ 4.00GHz
8,933
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 9th of December 2025 - Higher results represent better value
Intel Core i5-6600K @ 3.50GHz
58.7
Intel Core i7-6700K @ 4.00GHz
64.3
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 9th of December 2025 - Higher results represent better performance
Intel Core i5-6600K @ 3.50GHz
2,314
Intel Core i7-6700K @ 4.00GHz
2,498
PassMark Software © 2008-2025
Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per day Average CPU Utilization (0-100%)1 Power cost, $ per kWh2
8
25
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 i5-6600K @ 3.50GHz Intel Core i7-6700K @ 4.00GHz
Max TDP91W95W
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.