New miner looking for help (PSU+cooling system)

I recently got into mining and decided to put my gaming PC to work. I own a GTX 1080 and a RTX 3090 is on the way. How do I pick the correct cooling system and PSU? Any help is appreciated, Thanks in advance.

CPU cooling systems won’t cool the video cards whether air cooled, AIO, or custom water cooled.

Make sure your case has plenty of fans and when mining, reduce the Power level as much as possible.

Set GPU fans above 80%