3080 and 2080 super

Can I add a 3080 to my pc and continue mining with my current 2080 super and 3600x (monero) WITH 750 watt psu? I try to stay efficient so my 2080 super is at 60% PL and cpu is undervolted so would definitely lower PL on 3080 to whatever is most efficient.

I've also heard about thermal pad issues on the 3080 while mining and wondered if that's an issue only if you're pushing the card hard vs trying to stay cool and efficient? Don't want to busy open the card.