i had a venice 3500+ that went straight up to 2.4ghz by increasing the fsb to around 220. and then up to 2.6 and on...
are you using any monitoring software or just judging by the p.c performance/speed?
use cpu-z for real-time display of the frequency then find a cpu benchmark tool, a heavy load program and judge the improvement, run it standard, then o'c'd and look for gains
just look for freeware prog's.
once you get up to 230ish... take it slow, test and test again.
look for the max setting you can safely re-boot/launch/test/strain the o/s and then back it off a little.
just learning myself so hope this helps...?