4090's TDP is 450W, and it demonstrably runs on 850W PSUs. If the cables are rated high enough and the PSU is large enough, there is no wattage that is "less v

4090's TDP is 450W, and it demonstrably runs on 850W PSUs. If the cables are rated high enough and the PSU is large enough, there is no wattage that is "less valid" than any other. The 3090 TI from the previous generation runs at 450W too, it just uses 3x6+2 cables rather than nvidia's fancy adapter.