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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel i7-6700K vs i7-6800K

The Intel Core i7-6800K @ 3.40GHz is newer than Intel Core i7-6700K @ 4.00GHz also around 17% faster in multi-threaded (CPU Mark) testing, but Intel Core i7-6700K @ 4.00GHz is around 10% faster in single-thread testing. However, 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 18640 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 i7-6700K @ 4.00GHz×Intel Core i7-6800K @ 3.40GHz+ ADD
Price $74.04 - BUY $69 - BUY
Socket TypeLGA1151LGA2011-v3
CPU ClassDesktopDesktop
Clockspeed4.0 GHz3.4 GHz
Turbo SpeedUp to 4.2 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 ChartQ3 2015Q2 2016
# of Samples168511789
CPU Value120.7155.6
Single Thread Rating(% diff. to max in group)2504(0.0%)2265(-9.5%)
CPU Mark(% diff. to max in group)8935(-16.8%)10734(0.0%)

CPU Mark Rating
As of 19th of January 2025 - Higher results represent better performance
Intel Core i7-6700K @ 4.00GHz
8,935
Intel Core i7-6800K @ 3.40GHz
10,734
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 19th of January 2025 - Higher results represent better value
Intel Core i7-6700K @ 4.00GHz
120.7
Intel Core i7-6800K @ 3.40GHz
155.6
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 19th of January 2025 - Higher results represent better performance
Intel Core i7-6700K @ 4.00GHz
2,504
Intel Core i7-6800K @ 3.40GHz
2,265
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 i7-6700K @ 4.00GHz 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.