teddybear873
If you have a manual for the manual or can download one from the MB website then the instructions will tell you how to change the bus sppeed and/or the clock mukltiplier. You presently have 2 X 60mhz = 120mhz. You want to try 2 X 66mhz = 133mhz or 2.5 X 60 = 150mhz.
Sometimes there will be a silkscreen table on the MB circuit board itself near a group of jumpers that tell you this same information.
Some MBs simply don't allow any options.