Tonight I have been experimenting with some of the Beta Bios. I have noticed that the F8D UD5 Bios are working the best for me. I have a 4.20Ghz clock speed, with a BCLK of 200 and x21 cpu ratio. Uncore is running atr x18: 3600 mhz, and QPI is x36: 3600Mhz. I have RAM at 800Mhz 7-7-7-21 timings and Vcore of 1.328V in Cpu-z, something like 1.3625V in BIOS. I have VTT of 1.395V, DRAM of 1.680V, CPU PLL of 1.880V and IOH of 1.160V. This settings would not give anything stable with the F8e and the F7d, and F7c BIOS. I am not having any luck getting the chip over a base clock of 200 and being stable, nothing at all and even with the high voltage on vcore and vtt. I am not sure if the board is limiting me, since my MSi eclisple SLI would let me hit 4.45ghz+ with a base clock higher than 210.