AMD Ryzen 9 3900X vs Intel Core i5-10400
37.6Single-core30.4
54.2Multi-core32.2
78.3Gamingspec-based36
17 spec wins — AMD Ryzen 9 3900X2 spec wins — Intel Core i5-10400
InnoReviews verdict
AMD Ryzen 9 3900X wins this desktop processor face-off, 55.3 to 32.6, pulling ahead mainly in multi-core (+22) and single-core (+7). Intel Core i5-10400 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 single-core score: 38 vs 30
- Stronger multi-core score: 54 vs 32
- 433% higher L3 cache: 64 MB vs 12 MB
- 300% higher L2 cache: 6 MB vs 2 MB
- 159% higher PassMark: 32,600 vs 12,600
Reasons to pick the Intel Core i5-10400
- 38% lower Base TDP: 65 W vs 105 W
- Lower launch price: $182 vs $499
General
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| Announced | 2019 | 2020 |
| Socket | AM4 | LGA1200 |
| Process | 7 nm+50% | 14 nm |
| Base TDP | 105 W | 65 W+38% |
| Max turbo power | 142 W+6% | 134 W |
| Unlocked multiplier | Yes | No |
| Cooler included | Yes | Yes |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| Cores | 12+100% | 6 |
| Performance cores | 12+100% | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 24+100% | 12 |
| Base clock | 3.8 GHz+31% | 2.9 GHz |
| Boost clock | 4.6 GHz+7% | 4.3 GHz |
| L2 cache | 6 MB+300% | 2 MB |
| L3 cache | 64 MB+433% | 12 MB |
Integrated GPU
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| iGPU | — | Intel UHD Graphics 630 |
| iGPU clock | — | 1,100 MHz |
Memory
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| Memory support | DDR4-3200 | DDR4-2666 |
| Max memory | 128 GB | 128 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| PCIe version | 4+33% | 3 |
| CPU PCIe lanes | 24+50% | 16 |
Benchmarks
| Spec | AMD Ryzen 9 3900X | Intel Core i5-10400 |
|---|---|---|
| Geekbench 6 (single) | 1,540+11%Bottom 32% | 1,390Bottom 23% |
| Geekbench 6 (multi) | 11,000+90%Top 47% | 5,800Bottom 27% |
| Cinebench R23 (single) | 1,300+18%Bottom 33% | 1,100Bottom 16% |
| Cinebench R23 (multi) | 18,300+129%Top 32% | 8,000Bottom 25% |
| PassMark | 32,600+159%Top 37% | 12,600Bottom 19% |
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