I am now testing my new board and had some problems with it. With the latest bios it wouldn boot from my ssd's in raid. That problems is solved with 0106 beta bios. Now my CPU isnt stable anymore at 4.2GHZ. Before i owned a Gigabyte mobo and my CPU ran 4200mhz 1.39v small FFT. Now i can do 19x200, 20x200 1.35v but 4200mhz just freezes my pc. Even at 1.44v! Also in CPU Z i see that the multi jumps from 21 to 20,5!! I did the 21X trick as EVA2000 explained in the start post. I also tried to bump any voltage: CPU VTT/ ICH/ IOH. Perhaps i forgot something??? Anyone tips to gain back my 4200 mhz stable CPU?