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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i9-9900KF vs i9-9900X

The Intel Core i9-9900KF @ 3.60GHz is newer than Intel Core i9-9900X @ 3.50GHz and is around -17% slower in multi-threaded (CPU Mark) testing. The Intel Core i9-9900KF @ 3.60GHz is around 14% faster in single-thread testing. Also, Intel Core i9-9900KF @ 3.60GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 2800 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 i9-9900KF @ 3.60GHz×Intel Core i9-9900X @ 3.50GHz+ ADD
Price Search Online $221.12 - BUY
Socket TypeFCLGA1151-2FCLGA2066
CPU ClassDesktopDesktop
Clockspeed3.6 GHz3.5 GHz
Turbo SpeedUp to 5.0 GHzUp to 4.5 GHz
# of Physical Cores8 (Threads: 16)10 (Threads: 20)
CacheL1: 512KB, L2: 2.0MB, L3: 16MBL1: 640KB, L2: 10.0MB, L3: 19MB
TDP95W165W
Yearly Running Cost$17.34$30.11
Other
First Seen on ChartQ2 2019Q4 2018
# of Samples2476324
CPU Rank1056838
CPU Value60.398.0
Single Thread Rating(% diff. to max in group)2903(0.0%)2543(-12.4%)
CPU Mark(% diff. to max in group)18021(-16.8%)21672(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 10th of March 2026 - Higher results represent better performance
Intel Core i9-9900KF @ 3.60GHz
18,021
Intel Core i9-9900X @ 3.50GHz
21,672
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 10th of March 2026 - Higher results represent better value
Intel Core i9-9900KF @ 3.60GHz
60.3
Intel Core i9-9900X @ 3.50GHz
98.0
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 10th of March 2026 - Higher results represent better performance
Intel Core i9-9900KF @ 3.60GHz
2,903
Intel Core i9-9900X @ 3.50GHz
2,543
PassMark Software © 2008-2026
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 i9-9900KF @ 3.60GHz Intel Core i9-9900X @ 3.50GHz
Max TDP95W165W
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.