I have around 45+x XFX Rx 580 8gb GTR Best buy edtion with the 1 button pop out fans. Imo best thing every created especially for mining. I can easly replace fans in less then 1 min and I run them @ 95% all the time as they're cheap to replace. Each one gets 31.2-31.8 Mh's and stays very cool and very good at undervolting