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CPU Benchmarks

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Intel i5-8400 vs i3-8350K

The Intel Core i3-8350K @ 4.00GHz is newer than Intel Core i5-8400 @ 2.80GHz, while Intel Core i5-8400 @ 2.80GHz is around 26% faster in multi-threaded (CPU Mark) testing but the CPUs have comparable single-thread rating. However, Intel Core i3-8350K @ 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 6848 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 i5-8400 @ 2.80GHz×Intel Core i3-8350K @ 4.00GHz+ ADD
Price $101.98 - BUY $159 - BUY
Socket TypeFCLGA1151-2FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed2.8 GHz4.0 GHz
Turbo SpeedUp to 4.0 GHzNot Supported
# of Physical Cores6 (Threads: 6)4 (Threads: 4)
CacheL1: 384KB, L2: 1.5MB, L3: 9MBL1: 256KB, L2: 1.0MB, L3: 8MB
TDP65W91W
Yearly Running Cost$11.86$16.61
OtherIntel UHD Graphics 630Intel UHD Graphics 630
First Seen on ChartQ4 2017Q4 2017
# of Samples6495353
CPU Value90.543.1
Single Thread Rating(% diff. to max in group)2382(-3.8%)2476(0.0%)
CPU Mark(% diff. to max in group)9232(0.0%)6859(-25.7%)

CPU Mark Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
9,232
Intel Core i3-8350K @ 4.00GHz
6,859
PassMark Software © 2008-2024
CPU Value (CPU Mark / $Price)
As of 27th of July 2024 - Higher results represent better value
Intel Core i5-8400 @ 2.80GHz
90.5
Intel Core i3-8350K @ 4.00GHz
43.1
PassMark Software © 2008-2024
CPU Single Thread Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
2,382
Intel Core i3-8350K @ 4.00GHz
2,476
PassMark Software © 2008-2024

Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per dayAverage CPU Utilization (0-100%)1Power cost, $ per kWh2
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 i5-8400 @ 2.80GHzIntel Core i3-8350K @ 4.00GHz
Max TDP65W91W
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.