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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i3-8100 vs i5-8400 vs i7-8700

All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 22163 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 i3-8100 @ 3.60GHz×Intel Core i5-8400 @ 2.80GHz×Intel Core i7-8700 @ 3.20GHz+ ADD
Price $49.48 - BUY $151.7 - BUY $145.05 - BUY
Socket TypeFCLGA1151-2FCLGA1151-2FCLGA1151-2
CPU ClassDesktopDesktopDesktop
Clockspeed3.6 GHz2.8 GHz3.2 GHz
Turbo SpeedNot SupportedUp to 4.0 GHzUp to 4.6 GHz
# of Physical Cores4 (Threads: 4)6 (Threads: 6)6 (Threads: 12)
CacheL1: 256KB, L2: 1.0MB, L3: 6MBL1: 384KB, L2: 1.5MB, L3: 9MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP65W65W65W
Yearly Running Cost$11.86$11.86$11.86
OtherIntel UHD Graphics 630Intel UHD Graphics 630Intel UHD Graphics 630
First Seen on ChartQ4 2017Q4 2017Q4 2017
# of Samples3702731611145
CPU Value123.360.888.2
Single Thread Rating(% diff. to max in group)2209(-16.1%)2375(-9.8%)2634(0.0%)
CPU Mark(% diff. to max in group)6100(-52.3%)9223(-27.9%)12796(0.0%)

CPU Mark Rating
As of 13th of March 2025 - Higher results represent better performance
Intel Core i3-8100 @ 3.60GHz
6,100
Intel Core i5-8400 @ 2.80GHz
9,223
Intel Core i7-8700 @ 3.20GHz
12,796
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 13th of March 2025 - Higher results represent better value
Intel Core i3-8100 @ 3.60GHz
123.3
Intel Core i5-8400 @ 2.80GHz
60.8
Intel Core i7-8700 @ 3.20GHz
88.2
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 13th of March 2025 - Higher results represent better performance
Intel Core i3-8100 @ 3.60GHz
2,209
Intel Core i5-8400 @ 2.80GHz
2,375
Intel Core i7-8700 @ 3.20GHz
2,634
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 i3-8100 @ 3.60GHz Intel Core i5-8400 @ 2.80GHz Intel Core i7-8700 @ 3.20GHz
Max TDP65W65W65W
Power consumption per day (kWh)NANANA
Running cost per dayNANANA
Power consumption per year (kWh)NANANA
Running cost per yearNANANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.