Ryzen 9 7900X + RX 6800: bottleneck check
GPU-limited at 1440p. GPU-bound (normal).
The RX 6800 is the part working hardest at 1440p, which is what you want. The Ryzen 9 7900X keeps about 23% in reserve.
By resolution
| Resolution | Limiting part | Severity | Verdict |
|---|---|---|---|
| 1080p | GPU | 16% | balanced |
| 1440p | GPU | 23% | GPU-bound (normal) |
| 4K | GPU | 40% | GPU-bound (normal) |
The RX 6800 is the limiting part at every resolution, which is the healthy direction, and the gap is small enough that neither part is wasted. Upgrade the GPU first when you want more frames.
Specifications
| Cores / threads | 12 / 24 |
|---|---|
| Max boost | 5.6 GHz |
| Socket | AM5 |
| TDP | 170 W manufacturer-published TDP — sustained turbo can be higher · AMD |
| Released | 2022 |
| Gaming index | 81 / 100 |
| Multi-core index | 86 / 100 |
| VRAM | 16 GB |
|---|---|
| Board power | 250 W |
| Released | 2020 |
| 1080p index | 43.0 / 100 |
| 1440p index | 37 / 100 |
| 4K index | 31.9 / 100 |
Power supply
The RX 6800 measured 235 W average while gaming (344 W highest 20 ms spike, TechPowerUp). With the Ryzen 9 7900X at its TDP of 170 W and about 75 W for the rest of the system, the sustained load is about 480 W. A 650 W unit is the safe choice. Details on the RX 6800 PSU page or try other pairs in the PSU calculator.
Upgrade paths
CPUs that remove the bottleneck
AM5Cards that use the Ryzen 9 7900X fully
Best CPU for the RX 6800 Best GPU for the Ryzen 9 7900X RX 6800 PSU requirements
Same CPU, other cards
AllSame card, other CPUs
AllIndexes are relative estimates aggregated from published reviews; real results vary by game, settings, memory speed and drivers. Methodology.