AMD Ryzen 9 3900X vs Intel Core i7-8700K
37.6Single-core37.3
54.2Multi-core34.7
78.3Gaming38.5
16 spec wins — AMD Ryzen 9 3900X3 spec wins — Intel Core i7-8700K
InnoReviews verdict
AMD Ryzen 9 3900X wins this desktop processor face-off, 55.3 to 36.4, pulling ahead mainly in gaming (+40) and Multi-core (+20). Intel Core i7-8700K still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the AMD Ryzen 9 3900X
- Stronger Multi-core score: 54 vs 35
- Stronger gaming score: 78 vs 39
- 433% higher L3 cache: 64 MB vs 12 MB
- 300% higher L2 cache: 6 MB vs 2 MB
- 135% higher PassMark: 32,600 vs 13,900
Reasons to pick the Intel Core i7-8700K
- 10% lower Base TDP: 95 W vs 105 W
- Lower launch price: $359 vs $499
General
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| Announced | 2019 | 2017 |
| Socket | AM4 | LGA1151-v2 |
| Process | 7 nm+50% | 14 nm |
| Base TDP | 105 W | 95 W+10% |
| Max turbo power | 142 W | — |
| Unlocked multiplier | Yes | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| Cores | 12+100% | 6 |
| Performance cores | 12+100% | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 24+100% | 12 |
| Base clock | 3.8 GHz+3% | 3.7 GHz |
| Boost clock | 4.6 GHz | 4.7 GHz+2% |
| L2 cache | 6 MB+300% | 2 MB |
| L3 cache | 64 MB+433% | 12 MB |
Integrated GPU
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| iGPU | — | Intel UHD Graphics 630 |
| iGPU clock | — | 1,200 MHz |
Memory
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| Memory support | DDR4-3200 | DDR4-2666 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| PCIe version | 4+33% | 3 |
| CPU PCIe lanes | 24+50% | 16 |
Benchmarks
| Spec | AMD Ryzen 9 3900X | Intel Core i7-8700K |
|---|---|---|
| Geekbench 6 (single) | 1,540Top 63% | 1,560+1%Top 58% |
| Geekbench 6 (multi) | 11,000+62%Top 35% | 6,800Top 59% |
| Cinebench R23 (single) | 1,300+2%Top 59% | 1,270Top 63% |
| Cinebench R23 (multi) | 18,300+99%Top 24% | 9,200Top 61% |
| PassMark | 32,600+135%Top 26% | 13,900Top 68% |
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