I got it up to 470FSB quite easily and considering its been nearly 4 years since being a full time torturer I was quite pleased with the result though my 24/7 OC is only 3.60GHz which only required a minimal bump in V for the NB and core

I never really OC's my E8500 much and it ran @ 3.40GHz most of its life @ default Vcore, the ONLY reason I bought the Q9550 was for video conversion, DVD to MP4 and HD-DVD to bloooray etc and @ 3.60GHz it gets the job done soooooo much faster over the old dual core