I have killed my board. Well, is not dead, but is seriously sick.
I was 1000+ linpack rock solid in 19x211/x36/x16/x8 with 1.38750 Vcc, 1.40 Qpi and 1.28 IOH. So i wanted to tighten the Uncore to x17, leaving the Vdimm in 1.66v. Then i ran Linpack, the system was frozen in 14 mins, and after reboot i could see one of my 750Gb HD completely dead, and the board no longer accepts more than just a little OC. Clear CMOS, battery off, flashing to another Bios..nothing helps.
Too much stressing, i think...