Just finished assembling my new setup w/ 2 970s in my custom WC loop this past weekend. I'm still testing things, but I can say my 970s in a parallel configuration went from 80C max on air in BF4(temp target defaults to 80C) to 41C Max w/ radiator fans slowed down for lower noise. LIke mentioned above though, if you go the custom loop route, do lots of research and planning before you buy. It can get expensive very quick, but if your into it, the payoffs in silence, temps, and looks can be great