Been using ATT for many years with no problems. This morning, tried to start Far Cry 3 with my custom profile and got a Windows driver signing error. I've never seen that before... Anyway, after some Googling, I fixed it by changing the signed driver settings and got ATT started again. But now my overclocking settings are blank, the memory setting is wrong, and I can't manually change the settings. When I hit "Apply", everything reverts back and nothing happens. Here's a screenshot of my overclocking window: http://i.imgur.com/v849B.png The voltage is blank, and the current MEM value is actually 500 MHz (Not 1000 MHz). GPU-Z and MSI Afterburner show the correct values. I've reinstalled (and sweeped) the drivers, tried with and without CCC, and I've tried 3 versions of ATT and the problem persists. solved, somehow my ATT was running in Windows XP Compatability. Reset it to normal, everything's fine.