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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i9-9900X vs i9-9900K

The Intel Core i9-9900X @ 3.50GHz is newer than Intel Core i9-9900K @ 3.60GHz also around 16% faster in multi-threaded (CPU Mark) testing, but Intel Core i9-9900K @ 3.60GHz is around 13% faster in single-thread testing. However, Intel Core i9-9900K @ 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 14074 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 i9-9900X @ 3.50GHz×Intel Core i9-9900K @ 3.60GHz+ ADD
Price $253.65 - BUY $305.32 - BUY
Socket TypeFCLGA2066FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed3.5 GHz3.6 GHz
Turbo SpeedUp to 4.5 GHzUp to 5.0 GHz
# of Physical Cores10 (Threads: 20)8 (Threads: 16)
CacheL1: 640KB, L2: 10.0MB, L3: 19MBL1: 512KB, L2: 2.0MB, L3: 16MB
TDP165W95W
Yearly Running Cost$30.11$17.34
OtherIntel UHD Graphics 630
First Seen on ChartQ4 2018Q4 2018
# of Samples25813816
CPU Value85.559.7
Single Thread Rating(% diff. to max in group)2556(-12.6%)2926(0.0%)
CPU Mark(% diff. to max in group)21686(0.0%)18235(-15.9%)

CPU Mark Rating
As of 8th of January 2025 - Higher results represent better performance
Intel Core i9-9900X @ 3.50GHz
21,686
Intel Core i9-9900K @ 3.60GHz
18,235
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 8th of January 2025 - Higher results represent better value
Intel Core i9-9900X @ 3.50GHz
85.5
Intel Core i9-9900K @ 3.60GHz
59.7
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 8th of January 2025 - Higher results represent better performance
Intel Core i9-9900X @ 3.50GHz
2,556
Intel Core i9-9900K @ 3.60GHz
2,926
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 i9-9900X @ 3.50GHz Intel Core i9-9900K @ 3.60GHz
Max TDP165W95W
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.