Ryzen 7 3700X + RX 6900 XT: bottleneck check
CPU-limited at 1440p. Mild CPU bottleneck.
The Ryzen 7 3700X cannot feed the RX 6900 XT fast enough at 1440p, so the card sits partly idle in CPU-heavy games.
By resolution
| Resolution | Limiting part | Severity | Verdict |
|---|---|---|---|
| 1080p | CPU | 29% | moderate CPU bottleneck |
| 1440p | CPU | 22% | mild CPU bottleneck |
| 4K | CPU | 1% | balanced |
The Ryzen 7 3700X is the limiting part at every resolution, even at 4K (1%). The RX 6900 XT is a much stronger card than this processor can drive — plan a CPU upgrade before spending more on graphics.
Specifications
| Cores / threads | 8 / 16 |
|---|---|
| Max boost | 4.4 GHz |
| Socket | AM4 |
| Power used for the PSU estimate | 65 W not confirmed against a manufacturer page |
| Released | 2019 |
| Gaming index | 52 / 100 |
| Multi-core index | 50 / 100 |
| VRAM | 16 GB |
|---|---|
| Board power | 300 W |
| Released | 2020 |
| 1080p index | 50.7 / 100 |
| 1440p index | 45 / 100 |
| 4K index | 39.9 / 100 |
Power supply
The RX 6900 XT measured 305 W average while gaming (636 W highest 20 ms spike, TechPowerUp). With the Ryzen 7 3700X at a power figure of 65 W and about 75 W for the rest of the system, the sustained load is about 445 W. A 850 W unit is the safe choice. Details on the RX 6900 XT PSU page or try other pairs in the PSU calculator.
Upgrade paths
CPUs that remove the bottleneck
AM4Best CPU for the RX 6900 XT Best GPU for the Ryzen 7 3700X RX 6900 XT 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.