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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i3-9350KF vs i5-8400

The Intel Core i3-9350KF @ 4.00GHz is newer than Intel Core i5-8400 @ 2.80GHz and is around -18% slower in multi-threaded (CPU Mark) testing. The Intel Core i3-9350KF @ 4.00GHz is around 13% faster in single-thread testing. Also, Intel Core i3-9350KF @ 4.00GHz uses around 33% more power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 7619 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 i3-9350KF @ 4.00GHz×Intel Core i5-8400 @ 2.80GHz+ ADD
Price $129 - BUY Search Online
Socket TypeFCLGA1151-2FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed4.0 GHz2.8 GHz
Turbo SpeedUp to 4.6 GHzUp to 4.0 GHz
# of Physical Cores4 (Threads: 4)6 (Threads: 6)
CacheL1: 256KB, L2: 1.0MB, L3: 8MBL1: 384KB, L2: 1.5MB, L3: 9MB
TDP91W65W
Yearly Running Cost$16.61$11.86
OtherIntel UHD Graphics 630
First Seen on ChartQ2 2019Q4 2017
# of Samples537566
CPU Value58.60.0
Single Thread Rating(% diff. to max in group)2686(0.0%)2373(-11.7%)
CPU Mark(% diff. to max in group)7559(-18.0%)9223(0.0%)

CPU Mark Rating
As of 25th of April 2025 - Higher results represent better performance
Intel Core i3-9350KF @ 4.00GHz
7,559
Intel Core i5-8400 @ 2.80GHz
9,223
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 25th of April 2025 - Higher results represent better value
Intel Core i3-9350KF @ 4.00GHz
58.6
Intel Core i5-8400 @ 2.80GHz
NA
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 25th of April 2025 - Higher results represent better performance
Intel Core i3-9350KF @ 4.00GHz
2,686
Intel Core i5-8400 @ 2.80GHz
2,373
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 i3-9350KF @ 4.00GHz Intel Core i5-8400 @ 2.80GHz
Max TDP91W65W
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.