A:Answer Mine came with an AC Bel P2G 750 watt. It seemed able to hang with the 3080, but it set off my AFCI circuit breaker (arc fault circuit interrupter) a few times. I don't know if it is supposed to arc inherently, but I ended up replacing it with a Corsair 850 to fix the issue.
Bottom line...
The stock 750 may be fine, but it'll trip certain types of breakers sometimes.