the bootloop is common on other GB boards, its the BIOS checking and rechecking itself. When the OC fails and then bootloops that is really annoying because it should reset, but sometimes fails to reset the OC. I am surprised you were able to change blck through windows OC Nub, i have no luck with it, i actually thought you have to reboot to change blck, and it isn't possible through windows, but who knows.