1300W should probablly be fine.
Of course we cannot really speak about,
how much power those futured gpu’s might going draw.
Because frankly they aren’t out yet.
But stil… since you are not opting for a 3990X,
i think it should be fine.
Yeah but TDP doesn’t really tell me that much.
It’s just a number measured in Watts on which a cooling,
solution should be capable to dissipate from the die.
It’s somewhat related to TPD but it isn’t the same.
Of course more headroom never hurts if money aint an issue.