OC/Modding is to be done on equipment that works 110% stock to-begin-with;
Usually these have better than average components onboard due to the result of "binning" ,
If youre trying too hard ~you shouldnt at all, OC'ing and modding should be done some-what EASY, without stressing too much the components. <- golden rule #1
Yours has a problem running stock, messing with it further with bios mods/unlocks might yield unforeseen results;
You risk loosing what already doesnt work like intended by the manufacturer.
Of course this looks like a message a "serious" OC'er would simply ignore, he knows better right ... but this is not the case for you, your card is busted running stock...
Stop messing with it, if it works, dont @#$% with it, you obviously are not very experienced in what youre doing(do not take this the wrong way);