Over 1,000,000 CPUs benchmarked
The AMD Ryzen 9 3900X is newer than Intel Core i7-8700K @ 3.70GHz and is significantly faster in multi-threaded (CPU Mark) testing but the CPUs have comparable single-thread rating. However, AMD Ryzen 9 3900X uses around 10% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 30474 benchmarks submitted from our PerformanceTest software and results and are updated daily to include new submissions.
Compare the performance of up to 5 different CPUs
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×Intel Core i7-8700K @ 3.70GHz | ×AMD Ryzen 9 3900X | + ADD | |
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Price |
$163.99 - BUY
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$179.52 - BUY
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Socket Type | FCLGA1151-2 | AM4 | |
CPU Class | Desktop | Desktop | |
Clockspeed | 3.7 GHz | 3.8 GHz | |
Turbo Speed | Up to 4.7 GHz | Up to 4.6 GHz | |
# of Physical Cores | 6 (Threads: 12) | 12 (Threads: 24) | |
Cache | L1: 384KB, L2: 1.5MB, L3: 12MB | L1: 768KB, L2: 6.0MB, L3: 64MB | |
TDP | 95W | 105W | |
Yearly Running Cost | $17.34 | $19.16 | |
Other | Intel UHD Graphics 630 | ||
First Seen on Chart | Q4 2017 | Q3 2019 | |
# of Samples | 15940 | 14534 | |
CPU Value | 82.9 | 181.5 | |
Single Thread Rating(% diff. to max in group) | 2722(0.0%) | 2705(-0.6%) | |
CPU Mark(% diff. to max in group) | 13590(-58.3%) | 32582(0.0%) |
Intel Core i7-8700K @ 3.70GHz | 13,590 | |
AMD Ryzen 9 3900X | 32,582 | |
PassMark Software © 2008-2025 |
Intel Core i7-8700K @ 3.70GHz | 82.9 | |
AMD Ryzen 9 3900X | 181.5 | |
PassMark Software © 2008-2025 |
Intel Core i7-8700K @ 3.70GHz | 2,722 | |
AMD Ryzen 9 3900X | 2,705 | |
PassMark Software © 2008-2025 |
Intel Core i7-8700K @ 3.70GHz | AMD Ryzen 9 3900X | |
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Max TDP | 95W | 105W |
Power consumption per day (kWh) | NA | NA |
Running cost per day | NA | NA |
Power consumption per year (kWh) | NA | NA |
Running cost per year | NA | NA |