AMD Ryzen 9 3900X vs AMD Ryzen 9 7900X3D
37.6Single-core77.8
54.2Multi-core75.2
78.3Gamingspec-based94.4
3 spec wins — AMD Ryzen 9 3900X14 spec wins — AMD Ryzen 9 7900X3D
InnoReviews verdict
AMD Ryzen 9 7900X3D wins this desktop processor face-off, 80.8 to 55.3, pulling ahead mainly in single-core (+40) and multi-core (+21). AMD Ryzen 9 3900X 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
- 12% lower Base TDP: 105 W vs 120 W
- Has Unlocked multiplier — the other doesn't
- Has Cooler included — the other doesn't
- Lower launch price: $499 vs $599
Reasons to pick the AMD Ryzen 9 7900X3D
- Stronger single-core score: 78 vs 38
- Stronger multi-core score: 75 vs 54
- 100% higher L2 cache: 12 MB vs 6 MB
- 100% higher L3 cache: 128 MB vs 64 MB
- 96% higher Geekbench 6 (single): 3,020 vs 1,540
General
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| Announced | 2019 | 2023 |
| Socket | AM4 | AM5 |
| Process | 7 nm | 5 nm+29% |
| Base TDP | 105 W+12% | 120 W |
| Max turbo power | 142 W | 162 W+14% |
| Unlocked multiplier | Yes | No |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| Cores | 12 | 12 |
| Performance cores | 12 | 12 |
| Efficiency cores | 0 | 0 |
| Threads | 24 | 24 |
| Base clock | 3.8 GHz | 4.4 GHz+16% |
| Boost clock | 4.6 GHz | 5.6 GHz+22% |
| L2 cache | 6 MB | 12 MB+100% |
| L3 cache | 64 MB | 128 MB+100% |
Integrated GPU
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| iGPU | — | AMD Radeon Graphics |
| iGPU clock | — | 2,200 MHz |
Memory
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| Memory support | DDR4-3200 | DDR5-5200 |
| Max memory | 128 GB | 128 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| PCIe version | 4 | 5+25% |
| CPU PCIe lanes | 24 | 28+17% |
Benchmarks
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 7900X3D |
|---|---|---|
| Geekbench 6 (single) | 1,540Bottom 33% | 3,020+96%Top 17% |
| Geekbench 6 (multi) | 11,000Top 46% | 18,128+65%Top 20% |
| Cinebench R23 (single) | 1,300Bottom 34% | 1,908+47%Top 29% |
| Cinebench R23 (multi) | 18,300Top 31% | 26,747+46%Top 19% |
| PassMark | 32,600Top 37% | 50,200+54%Top 17% |
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