I'd recommend Colovore for power - they are specialized for this use case and do a great job for us. We started in the same situation where we had 10x RTX 8000

I'd recommend Colovore for power - they are specialized for this use case and do a great job for us. We started in the same situation where we had 10x RTX 8000 cards. We've since added tons of A6000 and A100 cards in our cabinet and have had no power issues.