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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core i7-3970X @ 3.50GHz vs Intel Core i5-8400 @ 2.80GHz

The values for the CPUs below are determined from thousands of PerformanceTest benchmark results and are updated daily.

  • 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 i7-3970X @ 3.50GHz×Intel Core i5-8400 @ 2.80GHz+ ADD
Price $177.83 - BUY $132.99 - BUY
Socket TypeLGA2011FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed3.5 GHz2.8 GHz
Turbo SpeedUp to 4.0 GHzUp to 4.0 GHz
# of Physical Cores6 (Threads: 12)6 (Threads: 6)
CacheL1: 512KB, L2: 2.0MB, L1: 256KB, L2: 1.0MB, L3: 9MB
Max TDP150W65W
Yearly Running Cost$27.38$11.86
OtherIntel UHD Graphics 630
First Seen on ChartQ1 2012Q4 2017
# of Samples3425427
CPU Value47.369.6
Single Thread Rating(% diff. to max in group)1839(-23.2%)2395(0.0%)
CPU Mark(% diff. to max in group)8408(-9.2%)9256(0.0%)

CPU Mark Rating
As of 23rd of March 2023 - Higher results represent better performance
Intel Core i7-3970X @ 3.50GHz
8,408
Intel Core i5-8400 @ 2.80GHz
9,256
PassMark Software © 2008-2023
CPU Value (CPU Mark / $Price)
As of 23rd of March 2023 - Higher results represent better value
Intel Core i7-3970X @ 3.50GHz
47.3
Intel Core i5-8400 @ 2.80GHz
69.6
PassMark Software © 2008-2023
CPU Single Thread Rating
As of 23rd of March 2023 - Higher results represent better performance
Intel Core i7-3970X @ 3.50GHz
1,839
Intel Core i5-8400 @ 2.80GHz
2,395
PassMark Software © 2008-2023

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 i7-3970X @ 3.50GHzIntel Core i5-8400 @ 2.80GHz
Max TDP150W65W
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.