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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-6900K vs i7-7800X

The Intel Core i7-7800X @ 3.50GHz is newer than Intel Core i7-6900K @ 3.20GHz, while Intel Core i7-6900K @ 3.20GHz is around 11% faster in multi-threaded (CPU Mark) testing but the CPUs have comparable single-thread rating. Both CPUs operates at simliar power levels (TDP). All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 1081 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 i7-6900K @ 3.20GHz×Intel Core i7-7800X @ 3.50GHz+ ADD
Price $120 - BUY $219 - BUY
Socket TypeFCLGA2011-3FCLGA2066
CPU ClassDesktopDesktop
Clockspeed3.2 GHz3.5 GHz
Turbo SpeedUp to 4.0 GHzUp to 4.0 GHz
# of Physical Cores8 (Threads: 16)6 (Threads: 12)
CacheL1: 512KB, L2: 2.0MB, L3: 20MBL1: 384KB, L2: 6.0MB, L3: 8MB
TDP140W140W
Yearly Running Cost$25.55$25.55
Other
First Seen on ChartQ2 2016Q2 2017
# of Samples506575
CPU Value120.658.8
Single Thread Rating(% diff. to max in group)2336(-2.4%)2393(0.0%)
CPU Mark(% diff. to max in group)14476(0.0%)12888(-11.0%)

CPU Mark Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Core i7-6900K @ 3.20GHz
14,476
Intel Core i7-7800X @ 3.50GHz
12,888
PassMark Software © 2008-2024
CPU Value (CPU Mark / $Price)
As of 27th of July 2024 - Higher results represent better value
Intel Core i7-6900K @ 3.20GHz
120.6
Intel Core i7-7800X @ 3.50GHz
58.8
PassMark Software © 2008-2024
CPU Single Thread Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Core i7-6900K @ 3.20GHz
2,336
Intel Core i7-7800X @ 3.50GHz
2,393
PassMark Software © 2008-2024

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 i7-6900K @ 3.20GHzIntel Core i7-7800X @ 3.50GHz
Max TDP140W140W
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.