I
Almost forgot to add, both the RTX 3060 and RX 6600XT recommends atleast a 550w PSU. Please upgrade your PSU to a 600W unit to make sure nothing can go wrong.
Msi is a good brand, but you can also try Seasonic, Corsair, EVGA, Coolermaster, etc. anything 80 plus rated.
Here is a tier list of...