I want to do one thing: set the fan speed of my gtx 260 lower, so eliminating the buzzing sound from the fan, as it is very uncomfortable for me. But when I use the low-level sytem settings, when changing fan speed, I also, it looks like, I do something with the display driver, because (even when uninstalling rivatuner) I get this Contrasty display. Now, when I click on the Reload display driver, the problem seems to go away. But I get this every time I start up windows and I surely don't want to repeat this process all over again. So, I would like to use defaults and then only tweak the fan speed to a lower setting.