AMD Ryzen 9 3900X vs AMD Ryzen 7 3800X: comparison
Comparison of AMD Ryzen 9 3900X and AMD Ryzen 7 3800X: key differences and a full specification table.
Key differences
AMD Ryzen 9 3900X has more cores (12 vs 8), more threads (24 vs 16), a higher maximum clock (4.6 GHz vs 4.5 GHz) and a larger L3 cache (64 MB vs 32 MB).
At the same time, AMD Ryzen 7 3800X has a higher base clock (3.9 GHz vs 3.8 GHz).
Both processors match on: TDP (105 W), process node (7 nm), memory channels (2), PCIe version (4).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | AMD Ryzen 9 3900X | AMD Ryzen 7 3800X |
|---|---|---|
| Cores / threads | 12 / 24 | 8 / 16 |
| Max boost clock | 4.6 GHz | 4.5 GHz |
| L3 cache | 64 MB | 32 MB |
| TDP | 105 W | 105 W |
| Process | 7 nm | 7 nm |
| Integrated graphics | Discrete Graphics Card Required | Discrete Graphics Card Required |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | AMD Ryzen 9 3900X | AMD Ryzen 7 3800X |
|---|---|---|
| General | ||
| Codename | Matisse | Matisse |
| Segment | Boxed Processor | Boxed Processor |
| Product line | AMD Ryzen 9 Desktop Processors | AMD Ryzen 7 Desktop Processors |
| Product family | AMD Ryzen Processors | AMD Ryzen Processors |
| Process | 7 nm | 7 nm |
| Launch date | 07/07/2019 | 07/07/2019 |
| Unlocked for overclocking | Yes | Yes |
| Operating system support | Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit | Windows 11 - 64-Bit Edition, Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit |
| Recommended cooling | Wraith PRISM | Wraith PRISM |
| CPU | ||
| Cores | 12 | 8 |
| Threads | 24 | 16 |
| Base clock | 3.8 GHz | 3.9 GHz |
| Max boost clock | 4.6 GHz | 4.5 GHz |
| L1 cache | 768 KB | 512 KB |
| L2 cache | 6 MB | 4 MB |
| L3 cache | 64 MB | 32 MB |
| TDP | 105 W | 105 W |
| Memory | ||
| Memory types | DDR4 | DDR4 |
| Memory channels | 2 | 2 |
| Max memory speed | 3.2 GHz | 3.2 GHz |
| Graphics | ||
| Integrated graphics | Discrete Graphics Card Required | Discrete Graphics Card Required |
| Has integrated graphics | No | No |
| I/O and interfaces | ||
| PCI Express revision | 4 | 4 |
| Package and thermal | ||
| Sockets supported | AM4 | AM4 |
| TJUNCTION | 95 °C | 95 °C |
| Identifiers | ||
| Product ID (OEM) | 100-000000023 | 100-000000025 |
| Product ID (Box) | 100-100000023BOX | 100-100000025BOX |
| Product ID (MPK) | 100-100000023MPK | 100-100000025MPK |
| Bundled cooler | Wraith Prism with RGB LED | Wraith Prism with RGB LED |