OK guys , I got this thing stable at stock clocks but now anything higher and it wont boot , sometimes even freezes during POST . Even a tiny 8x400 wont boot , am I missing something ? I bumped vcore way higher than my last mobo needed and tried increasing all voltages a little but didnt go overboard. I will try 9x333 and see if that helps .
I'm pretty sure it will come down to finding the sweetspot with your gtlrefs. My q6600 worked great all the way up 4.1ghz on auto settings, but chips really do vary.

I'd setup your volts at 'more than enough' settings, like you currently have. Then try experimenting with different GTLref values. Maybe using identical figures for the first two. I would say you can probably leave the last two gtlrefs at zero.

I found that I could actually find the sweetspot in memtest. So for instance with the QX -90mv would crap out after a minute in memtest, and then -95mv would get me all the way through.

Not sure what figures to recommend, because as I say they really do vary. It could be positive figures up to 100 or negative figures. (Maybe someone here can give some better pointers)

To give an example my qx9650 seemed to top out at 4.22 ghz stability testing wise. I would then start increasing volts and getting very little result. I then set my GTL refs to -110mv for the first two and bingo. 4.25, 4.30 priming nicely.

This is a little test I managed, that surprised me today with those GTLrefs. Mem at 1.975v



RLM