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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-9800X vs i7-8086K

The Intel Core i7-9800X @ 3.80GHz is newer than Intel Core i7-8086K @ 4.00GHz also around 22% faster in multi-threaded (CPU Mark) testing, but Intel Core i7-8086K @ 4.00GHz is around 9% faster in single-thread testing. However, Intel Core i7-8086K @ 4.00GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 1750 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 i7-9800X @ 3.80GHz×Intel Core i7-8086K @ 4.00GHz+ ADD
Price $334.58 - BUY $280.71 - BUY
Socket TypeFCLGA2066FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed3.8 GHz4.0 GHz
Turbo SpeedUp to 4.5 GHzUp to 5.0 GHz
# of Physical Cores8 (Threads: 16)6 (Threads: 12)
CacheL1: 512KB, L2: 8.0MB, L3: 17MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP165W95W
Yearly Running Cost$30.11$17.34
OtherIntel UHD Graphics 630
First Seen on ChartQ4 2018Q2 2018
# of Samples2461504
CPU Value54.150.3
Single Thread Rating(% diff. to max in group)2572(-9.0%)2826(0.0%)
CPU Mark(% diff. to max in group)18091(0.0%)14128(-21.9%)

CPU Mark Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Core i7-9800X @ 3.80GHz
18,091
Intel Core i7-8086K @ 4.00GHz
14,128
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of March 2025 - Higher results represent better value
Intel Core i7-9800X @ 3.80GHz
54.1
Intel Core i7-8086K @ 4.00GHz
50.3
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Core i7-9800X @ 3.80GHz
2,572
Intel Core i7-8086K @ 4.00GHz
2,826
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 i7-9800X @ 3.80GHz Intel Core i7-8086K @ 4.00GHz
Max TDP165W95W
Power consumption per day (kWh)0.330.19
Running cost per day$0.083$0.048
Power consumption per year (kWh)120.569.3
Running cost per year$30.11$17.34
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.