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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-8700K vs i7-7800X

The Intel Core i7-8700K @ 3.70GHz is newer than Intel Core i7-7800X @ 3.50GHz also around 5% faster in multi-threaded (CPU Mark) testing, it is around 12% faster in single-thread testing. However, Intel Core i7-7800X @ 3.50GHz uses around 38% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 16665 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 i7-8700K @ 3.70GHz×Intel Core i7-7800X @ 3.50GHz+ ADD
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Socket TypeFCLGA1151-2FCLGA2066
CPU ClassDesktopDesktop
Clockspeed3.7 GHz3.5 GHz
Turbo SpeedUp to 4.7 GHzUp to 4.0 GHz
# of Physical Cores6 (Threads: 12)6 (Threads: 12)
CacheL1: 384KB, L2: 1.5MB, L3: 12MBL1: 384KB, L2: 6.0MB, L3: 8MB
TDP95W140W
Yearly Running Cost$17.34$25.55
OtherIntel UHD Graphics 630
First Seen on ChartQ4 2017Q2 2017
# of Samples16034631
CPU Value0.00.0
Single Thread Rating(% diff. to max in group)2722(0.0%)2383(-12.4%)
CPU Mark(% diff. to max in group)13588(0.0%)12900(-5.1%)

CPU Mark Rating
As of 29th of March 2025 - Higher results represent better performance
Intel Core i7-8700K @ 3.70GHz
13,588
Intel Core i7-7800X @ 3.50GHz
12,900
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 29th of March 2025 - Higher results represent better performance
Intel Core i7-8700K @ 3.70GHz
2,722
Intel Core i7-7800X @ 3.50GHz
2,383
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 i7-8700K @ 3.70GHz Intel Core i7-7800X @ 3.50GHz
Max TDP95W140W
Power consumption per day (kWh)0.190.28
Running cost per day$0.048$0.070
Power consumption per year (kWh)69.3102.2
Running cost per year$17.34$25.55
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.