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AMD Ryzen 9 3900X vs AMD Ryzen 9 7900X: Comparison
AMD Ryzen 9 3900X and AMD Ryzen 9 7900X separate most on l2 cache: AMD Ryzen 9 3900X at 6 MB, AMD Ryzen 9 7900X at 12 MB, 50% in favour of AMD Ryzen 9 7900X. PCIe Lanes splits them by another 17%, again favouring AMD Ryzen 9 7900X. They match on 12 other specifications, including form factor, tdp and market segment. In Blender Cycles (CPU) the AMD Ryzen 9 7900X scores 414 against 268 for the AMD Ryzen 9 3900X, a lead of 35%.
Specs
| Specification |  |  |
|---|---|---|
| Form Factor | Desktop | Desktop |
| Codename | Matisse | Raphael |
| Release Year | 2019 | 2022 |
| TDP | 105 W | 105 W |
| Market Segment | Desktop | Desktop |
| Socket | AM4 | AM5 (LGA 1718) |
| Socket Status | End of Life | Current |
| Process Node | 7 nm | 5 nm |
| Performance Cores | 12 | 12 |
| Efficiency Cores | 0 | 0 |
| SMT Enabled | true | true |
| P-Core Base Clock | 3.8 | 4.7 |
| P-Core Boost Clock | 4.6 | 5.6 |
| Unlocked Multiplier | true | true |
| L2 Cache | 6 MB-50% | 12 MB |
| L3 Cache | 64 MB | 64 MB |
| Base Power | 105 W | 170 W |
| Max Turbo Power | 142 | 230 |
| Memory Type | DDR4 | DDR5 |
| Max Memory Speed | 3200 | 5200 |
| Memory Channels | 2 | 2 |
| Max Memory Capacity | 128 | 128 |
| ECC Support | false | true |
| Integrated Graphics | No | Yes |
| PCIe Generation | 4 | PCIe 5.0 |
| PCIe Lanes | 20-17% | 24 |
| Launch MSRP | 499 | 549 |
| Retail Availability | Retail | Boxed Retail |
| Architecture | Zen 2, Ryzen 3000 Series "Matisse" | Zen 4 (7000 series) |
| Cores | 12 | 12 |
| Threads | 24 | 24 |
Benchmarks
Measured results, not specifications. Percentages are the gap to the leading product in each test.
Blender Cycles (CPU)
Blender 4.5, Blender Open Data (CC0). Median of monster + junkshop + classroom, combined samples/min.
Blender renders 3D scenes by tracing light through them, which loads every core at once. The score measures sustained multi-core throughput, so a chip that wins here can still lose at gaming, where one or two fast cores matter more. Figures come from Blender's Open Data project, which places no restriction on reuse, and we publish the median of every submission for that chip on the same Blender version.
Verdict
AMD Ryzen 9 7900X
8.6 / 10 Expert Rating
The AMD Ryzen 9 7900X is a strong all-rounder for enthusiasts who want top clock speeds for both gaming and productivity.