What for are these blue buttons on sapphires cards ??
on /off what for ??
UEFI bios on/off. For W8, apparently according to what I read in the manual. I leave my little blue lights on for fun as well, no effect either way in Linux/W7. I have a bunch more sapphire 280x dual-x cards w/o that blue button as well, only has a little switch like we are all used to.