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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i5-8400 vs i7-7740X

The Intel Core i5-8400 @ 2.80GHz is newer than Intel Core i7-7740X @ 4.30GHz, while the multi-threaded (CPU Mark) is simliar, Intel Core i7-7740X @ 4.30GHz is around 12% faster in single-thread testing. However, Intel Core i5-8400 @ 2.80GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 7543 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 i7-7740X @ 4.30GHz+ ADD
Price $151.7 - BUY $156.14 - BUY
Socket TypeFCLGA1151-2FCLGA2066
CPU ClassDesktopDesktop
Clockspeed2.8 GHz4.3 GHz
Turbo SpeedUp to 4.0 GHzUp to 4.5 GHz
# of Physical Cores6 (Threads: 6)4 (Threads: 8)
CacheL1: 384KB, L2: 1.5MB, L3: 9MBL1: 256KB, L2: 1.0MB, L3: 8MB
TDP65W112W
Yearly Running Cost$11.86$20.44
OtherIntel UHD Graphics 630
First Seen on ChartQ4 2017Q3 2017
# of Samples7325218
CPU Value60.861.6
Single Thread Rating(% diff. to max in group)2375(-11.8%)2692(0.0%)
CPU Mark(% diff. to max in group)9222(-4.1%)9612(0.0%)

CPU Mark Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
9,222
Intel Core i7-7740X @ 4.30GHz
9,612
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of March 2025 - Higher results represent better value
Intel Core i5-8400 @ 2.80GHz
60.8
Intel Core i7-7740X @ 4.30GHz
61.6
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Core i5-8400 @ 2.80GHz
2,375
Intel Core i7-7740X @ 4.30GHz
2,692
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 i5-8400 @ 2.80GHz Intel Core i7-7740X @ 4.30GHz
Max TDP65W112W
Power consumption per day (kWh)0.130.22
Running cost per day$0.033$0.056
Power consumption per year (kWh)47.581.8
Running cost per year$11.86$20.44
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.