jb6684: Do you have that 7970 (UEFI BIOS) running in a "non UEFI" mobo too?. The thing is that ASUS FAQ is clear: "Other motherboards might work with our UEFI graphics cards but we cannot officially endorse compatibility as we don't have access to all BIOS and board revisions." Although they say they have done tests in ASUS mobos up to 4 years old. My ASUS P6x58D premium is just 4 years old, so I'm wondering if it is in or out...
BTW, the ASUS GTX680 UEFI FAQ here: http://rog.asus.com/forum/showthread.php?32906-ASUS-UEFI-vBIOS-tool-for-GTX-600-series-cards!-It-s-Here!
Thanx again for replies