Keep NB on 1.25, CPU PLL if it runs on 1.5 stable keep it there that should take care of 425FSB... I think 1.8 volts is too low for the OCZ, I think they even need 2 - 2.1 volts at least to be stable at 800mhz 4-4-4-12... auto sets only 1.8 volts and just the required voltage to boot the pc... your dimms are rated up to 2.35 volts mate for 1000mhz