NVIDIA has released the below minimum PSU requirements:
| GPU | PSU TGP | MIN. PSU WATTAGE |
|---|---|---|
| GeForce RTX 4090 | 450W | 850W |
| GeForce RTX 4080 16GB | 320W | 750W |
| GeForce RTX 4080 126GB | 285W | 700W |
Updated on: 26 / 10 / 2022