AMD Ryzen 9 3900X vs AMD Ryzen 9 9950X3D
37.6Single-core93.2
54.2Multi-core98.7
78.3Gamingspec-based95
2 spec wins — AMD Ryzen 9 3900X18 spec wins — AMD Ryzen 9 9950X3D
InnoReviews verdict
AMD Ryzen 9 9950X3D wins this desktop processor face-off, 96.1 to 55.3, pulling ahead mainly in single-core (+56) and multi-core (+45). 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
- 38% lower Base TDP: 105 W vs 170 W
- Has Cooler included — the other doesn't
- Lower launch price: $499 vs $699
Reasons to pick the AMD Ryzen 9 9950X3D
- Stronger single-core score: 93 vs 38
- Stronger multi-core score: 99 vs 54
- 167% higher L2 cache: 16 MB vs 6 MB
- 130% higher Cinebench R23 (multi): 42,018 vs 18,300
- 123% higher Geekbench 6 (single): 3,434 vs 1,540
General
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| Announced | 2019 | 2025 |
| Socket | AM4 | AM5 |
| Process | 7 nm | 4 nm+43% |
| Base TDP | 105 W+38% | 170 W |
| Max turbo power | 142 W | 230 W+62% |
| Unlocked multiplier | Yes | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| Cores | 12 | 16+33% |
| Performance cores | 12 | 16+33% |
| Efficiency cores | 0 | 0 |
| Threads | 24 | 32+33% |
| Base clock | 3.8 GHz | 4.3 GHz+13% |
| Boost clock | 4.6 GHz | 5.7 GHz+24% |
| L2 cache | 6 MB | 16 MB+167% |
| L3 cache | 64 MB | 128 MB+100% |
Integrated GPU
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| iGPU | — | AMD Radeon Graphics (2 CU RDNA 2) |
| iGPU clock | — | 2,200 MHz |
Memory
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| Memory support | DDR4-3200 | DDR5-5600 |
| Max memory | 128 GB | 256 GB+100% |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| PCIe version | 4 | 5+25% |
| CPU PCIe lanes | 24 | 28+17% |
Benchmarks
| Spec | AMD Ryzen 9 3900X | AMD Ryzen 9 9950X3D |
|---|---|---|
| Geekbench 6 (single) | 1,540Bottom 33% | 3,434+123%Top 1% |
| Geekbench 6 (multi) | 11,000Top 46% | 22,405+104%Top 4% |
| Cinebench R23 (single) | 1,300Bottom 34% | 2,259+74%Top 8% |
| Cinebench R23 (multi) | 18,300Top 31% | 42,018+130%Top 4% |
| PassMark | 32,600Top 37% | 70,094+115%Top 2% |
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