evga ftw3 - 105MHs/stock speeds/ fans 90% manually set, to keep it cool no problems
msi ventus - 107MHs/stock speeds/ fans 90% manually set, to keep it cool, no problems

3090 is not best for mining in terms of a output bang, to my opinion. 3080 or 3080 would be, due to the fact that price is half and performance i slightly less, so best bang for a buck.