Sorry to bring this thread avlive as well but was there ever a fix for the 533fsb issue. I am overclocking a PD805 and if I select any memory divider besides the default one the system wont boot. Running 166fsb and DDR2-443 , DDR2-553 and DDR2-6## with not boot , i'm running bios 1803. Should I try bios 0170?Thanks in advance.