1) did you update your
bios ?? if so try enabling Loadline Calibration this might enable you to drop
vcore a little.
2) I'd assume Normal GTLREF would be 64~65% which is the norm for dual core. Quads like about 66 ~67% ish ,(see the
gtl links i gave you earkier). So i'd assume your +/- % from around there. As you can see there are 2 controls gltref1 & gtlref2. GTLRef1 will control cores 0&3 GTLRef2 cores 1&4. So I'd try tweaking GTLRef1 1st.
lower your
vcore & try
Finding Optimum GTLref, obviously you can't use guru, but the principal is the same. when prime fails , got into
bios tweak the gtlref that failed & redo. You should find that prinme is running longer(use small ffts),
Also refer to the zenoth link i fgave you earlier.
luck