AMD Ryzen 9 3900X vs Intel Core Ultra 9 285K
37.6Single-core92.9
54.2Multi-core98.4
78.3Gamingspec-based71.3
5 spec wins — AMD Ryzen 9 3900X14 spec wins — Intel Core Ultra 9 285K
InnoReviews verdict
Intel Core Ultra 9 285K wins this desktop processor face-off, 90 to 55.3, pulling ahead mainly in single-core (+55) and multi-core (+44). 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
- 78% higher L3 cache: 64 MB vs 36 MB
- 50% higher Performance cores: 12 vs 8
- 16% lower Base TDP: 105 W vs 125 W
- Has Cooler included — the other doesn't
- Lower launch price: $499 vs $589
Reasons to pick the Intel Core Ultra 9 285K
- Stronger single-core score: 93 vs 38
- Stronger multi-core score: 98 vs 54
- 567% higher L2 cache: 40 MB vs 6 MB
- 132% higher Cinebench R23 (multi): 42,460 vs 18,300
- 112% higher Geekbench 6 (single): 3,265 vs 1,540
General
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| Announced | 2019 | 2024 |
| Socket | AM4 | LGA1851 |
| Process | 7 nm | 3 nm+57% |
| Base TDP | 105 W+16% | 125 W |
| Max turbo power | 142 W | 250 W+76% |
| Unlocked multiplier | Yes | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| Cores | 12 | 24+100% |
| Performance cores | 12+50% | 8 |
| Efficiency cores | 0 | 16 |
| Threads | 24 | 24 |
| Base clock | 3.8 GHz+3% | 3.7 GHz |
| Boost clock | 4.6 GHz | 5.7 GHz+24% |
| L2 cache | 6 MB | 40 MB+567% |
| L3 cache | 64 MB+78% | 36 MB |
Integrated GPU
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| iGPU | — | Intel Graphics |
| iGPU clock | — | 2,000 MHz |
Memory
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| Memory support | DDR4-3200 | DDR5-6400 |
| Max memory | 128 GB | 256 GB+100% |
| Memory channels | 2 | 2 |
Platform
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| PCIe version | 4 | 5+25% |
| CPU PCIe lanes | 24 | 24 |
Benchmarks
| Spec | AMD Ryzen 9 3900X | Intel Core Ultra 9 285K |
|---|---|---|
| Geekbench 6 (single) | 1,540Bottom 33% | 3,265+112%Top 7% |
| Geekbench 6 (multi) | 11,000Top 46% | 22,091+101%Top 5% |
| Cinebench R23 (single) | 1,300Bottom 34% | 2,382+83%Top 2% |
| Cinebench R23 (multi) | 18,300Top 31% | 42,460+132%Top 3% |
| PassMark | 32,600Top 37% | 67,224+106%Top 3% |
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