I'm on Win 7 SP1 64bit. Have an EVGA 780 classified as my main card and an EVGA 560ti as dedicated PhysX. While not gaming, I'm always running Folding @ Home on the 560... so I figured I'd try to get a boost by playing with the gpu clock. (I had just downloaded Precision and hadn't had time to tweak the 780 yet). First thing I did was add 150 mhz to the gpu clock offset and hit apply. The GPU clock reading went from ~850 to 405. Figuring I did it completely wrong, I clicked 'default' immediately, but beside changing the offset back to 0, the clock won't return to normal. The important detail that may have caused this, and that I missed, is that Precision isn't populating the Power Target and GPU Temp Target fields for that card. I can't use the sliders, but it lets me manually type in something for Power Target, but that does nothing. I've tried linking/unlinking the cards, restarting, updating drivers to Win10 ready ones.
 
My theory is that GPU temp target being 'greyed out' is making it's target 0C and that's why under load of Folding, it can only reach 405mhz. I checked the .cfg Precision keeps for the card and it has "/Startup/PowerLimit" value="0.000000" and is missing the ThermalLimit entry altogether.
 
I'm thinking maybe if I take out the 780, Precision might allow me to make the detailed changes I want to make to the 560. Is there anything else I can try before opening my comp up?

Linking was wishful thinking. When I have the setting for them to be linked, moving the 780's 'Target' sliders also moved the 560's.
 
I've restarted and uninstalled the steam version of Precision (to rule out Steam as a cause), and installed the standalone version. I'll try removing it completely and restarting as well as the profile folders it leaves behind.

I broke it again at +129 GPU offset and 1026mV voltage. It didn't run hot at all, but after 2 minutes or so, I noticed Folding paused itself and all the sensors showed 405mhz again. Back to uninstalling and restarting I guess.