I have 2 7870 in crossfire, just recently I noticed an option for amd chill. I enable it no problem and go to start Overwatch, which is the only game supported for me. My computer instantly crashes and I keep getting blue screen on a cycle. Finally able to get into safe mode and uninstall drivers, using DDU. Get blue screen when trying to install drivers, repeat last steps. Try to install an older driver, still blue screen. Take my primary card out and only use my second card, computer just wont boot no image. Swap cards, only have my primary in, loads fine, drivers are fine. I think the Chill option broke my second card somehow.