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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-5820K vs i5-10400

The Intel Core i5-10400 @ 2.90GHz is newer than Intel Core i7-5820K @ 3.30GHz also around 19% faster in multi-threaded (CPU Mark) testing, it is around 22% faster in single-thread testing. However, Intel Core i5-10400 @ 2.90GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 8717 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 i7-5820K @ 3.30GHz×Intel Core i5-10400 @ 2.90GHz+ ADD
Price Search Online Search Online
Socket TypeLGA2011-v3FCLGA1200
CPU ClassDesktopDesktop
Clockspeed3.3 GHz2.9 GHz
Turbo SpeedUp to 3.6 GHzUp to 4.3 GHz
# of Physical Cores6 (Threads: 12)6 (Threads: 12)
CacheL1: 384KB, L2: 1.5MB, L3: 15MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP140W65W
Yearly Running Cost$25.55$11.86
OtherIntel UHD Graphics 630
First Seen on ChartQ3 2014Q2 2020
# of Samples49643753
CPU Value0.00.0
Single Thread Rating(% diff. to max in group)1990(-22.4%)2565(0.0%)
CPU Mark(% diff. to max in group)9828(-18.5%)12061(0.0%)

CPU Mark Rating
As of 21st of April 2025 - Higher results represent better performance
Intel Core i7-5820K @ 3.30GHz
9,828
Intel Core i5-10400 @ 2.90GHz
12,061
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 21st of April 2025 - Higher results represent better performance
Intel Core i7-5820K @ 3.30GHz
1,990
Intel Core i5-10400 @ 2.90GHz
2,565
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 i7-5820K @ 3.30GHz Intel Core i5-10400 @ 2.90GHz
Max TDP140W65W
Power consumption per day (kWh)0.280.13
Running cost per day$0.070$0.033
Power consumption per year (kWh)102.247.5
Running cost per year$25.55$11.86
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.