Well since the modded bioses are not working for me, I have been playing the the voltage adjustment in ATItool .27b2. The bugs are aggravating, but I have achieved an insane high overclock on the memory, 100% stable on the pro bios with tighter timings than XT:


volts:

vddc = 1.163v
mvddc = 1.675v
mvddq = 1.965v