i have the z68xp-ud3 mobo, i upgraded fine, it's not a true uefi bios, it's a hybrid, i only found this out when reinstalling win7 and i used a gtp configured ssd as boot drive, since it's not really uefi bios i had major issues, reinstalled twice, then finally just converted my ssd back to mbr partitions. also if you plan to oc the bios just keep the bios version alot of the oc stuff isn't working(at least on my mobo)