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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-7700K vs i7-6800K

The Intel Core i7-7700K @ 4.20GHz is newer than Intel Core i7-6800K @ 3.40GHz and is around -10% slower in multi-threaded (CPU Mark) testing. The Intel Core i7-7700K @ 4.20GHz is around 20% faster in single-thread testing. Also, Intel Core i7-6800K @ 3.40GHz 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 14738 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 i7-7700K @ 4.20GHz×Intel Core i7-6800K @ 3.40GHz+ ADD
Price $185 - BUY Search Online
Socket Type LGA 1151LGA2011-v3
CPU ClassDesktopDesktop
Clockspeed4.2 GHz3.4 GHz
Turbo SpeedUp to 4.5 GHzUp to 3.8 GHz
# of Physical Cores4 (Threads: 8)6 (Threads: 12)
CacheL1: 256KB, L2: 1.0MB, L3: 8MBL1: 384KB, L2: 1.5MB, L3: 15MB
TDP95W140W
Yearly Running Cost$17.34$25.55
Other
First Seen on ChartQ4 2016Q2 2016
# of Samples129021836
CPU Value52.10.0
Single Thread Rating(% diff. to max in group)2710(0.0%)2261(-16.6%)
CPU Mark(% diff. to max in group)9631(-10.3%)10734(0.0%)

CPU Mark Rating
As of 26th of April 2025 - Higher results represent better performance
Intel Core i7-7700K @ 4.20GHz
9,631
Intel Core i7-6800K @ 3.40GHz
10,734
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 26th of April 2025 - Higher results represent better value
Intel Core i7-7700K @ 4.20GHz
52.1
Intel Core i7-6800K @ 3.40GHz
NA
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 26th of April 2025 - Higher results represent better performance
Intel Core i7-7700K @ 4.20GHz
2,710
Intel Core i7-6800K @ 3.40GHz
2,261
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 i7-7700K @ 4.20GHz Intel Core i7-6800K @ 3.40GHz
Max TDP95W140W
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.