First mistake was letting GpuT to update itself, there are a lot of bugs between fixes and generally its unstable. These bugs carried on into GpuT2. I strongly suggest you find a version of GpuT2 that works for you and never update it. The Sad thing is that ASUS doesnt keep a lot of versions on its websites, but maybe some forum member might help find a usable version.
TBH I wouldnt worry about the fan speeds until you get a working copy of GpuT2. If you really need a fan control program there are a few floating around, some are actually updated. Fanspeed is one of the most popular.
For overclocking try MSI Afterburner if you can find a working copy and its more stable than GpuT/GpuT2.
SpeedFan controls fans and temps, once you learn how to configure it properly. :cool: