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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

AMD Ryzen 9 3900X vs Ryzen 7 5800X vs Intel i7-7700K

All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 50500 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.

×AMD Ryzen 9 3900X×AMD Ryzen 7 5800X×Intel Core i7-7700K @ 4.20GHz+ ADD
Price $170.93 - BUY $138.99 - BUY $210.39 - BUY
Socket TypeAM4AM4 LGA 1151
CPU ClassDesktopDesktopDesktop
Clockspeed3.8 GHz3.8 GHz4.2 GHz
Turbo SpeedUp to 4.6 GHzUp to 4.7 GHzUp to 4.5 GHz
# of Physical Cores12 (Threads: 24)8 (Threads: 16)4 (Threads: 8)
CacheL1: 768KB, L2: 6.0MB, L3: 64MBL1: 512KB, L2: 4.0MB, L3: 32MBL1: 256KB, L2: 1.0MB, L3: 8MB
TDP105W105W95W
Yearly Running Cost$19.16$19.16$17.34
Other
First Seen on ChartQ3 2019Q4 2020Q4 2016
# of Samples160472067413779
CPU Value190.3199.445.7
Single Thread Rating(% diff. to max in group)2703(-21.6%)3447(0.0%)2704(-21.5%)
CPU Mark(% diff. to max in group)32523(0.0%)27716(-14.8%)9622(-70.4%)

CPU Mark Rating
As of 8th of November 2025 - Higher results represent better performance
AMD Ryzen 9 3900X
32,523
AMD Ryzen 7 5800X
27,716
Intel Core i7-7700K @ 4.20GHz
9,622
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 8th of November 2025 - Higher results represent better value
AMD Ryzen 9 3900X
190.3
AMD Ryzen 7 5800X
199.4
Intel Core i7-7700K @ 4.20GHz
45.7
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 8th of November 2025 - Higher results represent better performance
AMD Ryzen 9 3900X
2,703
AMD Ryzen 7 5800X
3,447
Intel Core i7-7700K @ 4.20GHz
2,704
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.
AMD Ryzen 9 3900X AMD Ryzen 7 5800X Intel Core i7-7700K @ 4.20GHz
Max TDP105W105W95W
Power consumption per day (kWh)NANANA
Running cost per dayNANANA
Power consumption per year (kWh)NANANA
Running cost per yearNANANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.