Core i5-11400F + RX 7800 XT: bottleneck check
CPU-limited at 1440p. Mild CPU bottleneck.
The Core i5-11400F cannot feed the RX 7800 XT fast enough at 1440p, so the card sits partly idle in CPU-heavy games.
By resolution
| Resolution | Limiting part | Severity | Verdict |
|---|---|---|---|
| 1080p | CPU | 24% | mild CPU bottleneck |
| 1440p | CPU | 17% | mild CPU bottleneck |
| 4K | GPU | 5% | balanced |
This is the classic pattern: at 1080p the Core i5-11400F is the limit (24%), while at 4K the RX 7800 XT takes over (5% GPU-limited). If you play at 1080p on a high-refresh monitor, a faster CPU is the upgrade that matters; at 1440p or 4K this pair is already well matched.
Specifications
| Cores / threads | 6 / 12 |
|---|---|
| Max boost | 4.4 GHz |
| Socket | LGA1200 |
| TDP | 65 W manufacturer-published TDP — sustained turbo can be higher · Intel ARK |
| Released | 2021 |
| Gaming index | 56 / 100 |
| Multi-core index | 42 / 100 |
| VRAM | 16 GB |
|---|---|
| Board power | 263 W |
| Released | 2023 |
| 1080p index | 51.7 / 100 |
| 1440p index | 46 / 100 |
| 4K index | 40.9 / 100 |
Power supply
The RX 7800 XT measured 250 W average while gaming (318 W highest 20 ms spike, TechPowerUp). With the Core i5-11400F at its TDP of 65 W and about 75 W for the rest of the system, the sustained load is about 390 W. A 750 W unit is the safe choice; a good-quality 650 W unit also covers the measured draw. Details on the RX 7800 XT PSU page or try other pairs in the PSU calculator.
Best CPU for the RX 7800 XT Best GPU for the Core i5-11400F RX 7800 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.