I been searching the board trying to figure out this whole frequency thing, without much luck. My current problem is that I just upgraded to a Biostar M7VIZ with a AMD XP 2500+ 1.833GHz 333 FSB and 333 DDR Memory. In the bios it shows current FSB at 100 (DRAM-133 DDR - 266) and in the properties it shows the CPU at 1.10 GHz. On the Mobo I have the choice of settings of 100/133/166 and not sure as to much one I should use. How do I go about getting this thing up to speed? Thanks.