I've redownloaded a million times. I have a asus gtx 680 2gb, and gpu tweak version 2.8.3.0 would not show the card in the box next to where itll say 3D. All i want to do is use the user define fan curve settings. I have uninstalled and downloaded version 2.7.9.0 and it displayed the card in that box, but still will not let me use the user define curve settings. Getting extremely frustrated haha. All nvidia drivers are up to date. If anyone has any suggestions please enlighten me.