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Intel i9-9900K vs i7-9800X

The Intel Core i7-9800X @ 3.80GHz is newer than Intel Core i9-9900K @ 3.60GHz however both CPUs have comparable multi-threaded (CPU Mark) and single-thread rating. Also, 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 16744 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 i9-9900K @ 3.60GHz×Intel Core i7-9800X @ 3.80GHz+ ADD
Price $336.96 - BUY $245.82 - BUY
Socket TypeFCLGA1151-2FCLGA2066
CPU ClassDesktopDesktop
Clockspeed3.6 GHz3.8 GHz
Turbo SpeedUp to 5.0 GHzUp to 4.5 GHz
# of Physical Cores8 (Threads: 16)8 (Threads: 16)
CacheL1: 512KB, L2: 2.0MB, L3: 16MBL1: 512KB, L2: 8.0MB, L3: 17MB
TDP95W165W
Yearly Running Cost$17.34$30.11
OtherIntel UHD Graphics 630
First Seen on ChartQ4 2018Q4 2018
# of Samples16446298
CPU Value53.773.8
Single Thread Rating(% diff. to max in group)2915(0.0%)2557(-12.3%)
CPU Mark(% diff. to max in group)18110(-0.1%)18133(0.0%)

CPU Mark Rating
As of 10th of December 2025 - Higher results represent better performance
Intel Core i9-9900K @ 3.60GHz
18,110
Intel Core i7-9800X @ 3.80GHz
18,133
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 10th of December 2025 - Higher results represent better value
Intel Core i9-9900K @ 3.60GHz
53.7
Intel Core i7-9800X @ 3.80GHz
73.8
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 10th of December 2025 - Higher results represent better performance
Intel Core i9-9900K @ 3.60GHz
2,915
Intel Core i7-9800X @ 3.80GHz
2,557
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 i9-9900K @ 3.60GHz Intel Core i7-9800X @ 3.80GHz
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.