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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i5-8600K vs i5-8400

The Intel Core i5-8600K @ 3.60GHz is newer than Intel Core i5-8400 @ 2.80GHz also around 9% faster in multi-threaded (CPU Mark) testing, it is around 8% faster in single-thread testing. However, Intel Core i5-8600K @ 3.60GHz uses around 38% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 9923 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 i5-8600K @ 3.60GHz×Intel Core i5-8400 @ 2.80GHz+ ADD
Price $85 - BUY $87.12 - BUY
Socket TypeFCLGA1151-2FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed3.6 GHz2.8 GHz
Turbo SpeedUp to 4.3 GHzUp to 4.0 GHz
# of Physical Cores6 (Threads: 6)6 (Threads: 6)
CacheL1: 384KB, L2: 1.5MB, L3: 9MBL1: 384KB, L2: 1.5MB, L3: 9MB
TDP95W65W
Yearly Running Cost$17.34$11.86
OtherIntel UHD Graphics 630Intel UHD Graphics 630
First Seen on ChartQ4 2017Q4 2017
# of Samples30796844
CPU Value120.0106.0
Single Thread Rating(% diff. to max in group)2590(0.0%)2380(-8.1%)
CPU Mark(% diff. to max in group)10196(0.0%)9235(-9.4%)

CPU Mark Rating
As of 23rd of December 2024 - Higher results represent better performance
Intel Core i5-8600K @ 3.60GHz
10,196
Intel Core i5-8400 @ 2.80GHz
9,235
PassMark Software © 2008-2024
CPU Value (CPU Mark / $Price)
As of 23rd of December 2024 - Higher results represent better value
Intel Core i5-8600K @ 3.60GHz
120.0
Intel Core i5-8400 @ 2.80GHz
106.0
PassMark Software © 2008-2024
CPU Single Thread Rating
As of 23rd of December 2024 - Higher results represent better performance
Intel Core i5-8600K @ 3.60GHz
2,590
Intel Core i5-8400 @ 2.80GHz
2,380
PassMark Software © 2008-2024
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 i5-8600K @ 3.60GHz Intel Core i5-8400 @ 2.80GHz
Max TDP95W65W
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.