250 Fsb

I tried going to 250 fsb but i had to up the vcore to 1.6 to post and i do this and it freezes on windows boot logo thing, then i upped it to 1.625 and same thing, i get it at 1.65 and it starts but then it says windows cannot boot because c:\windows\system32\config cannot be found or some random error, i back down to 225/230 and its all good, so am i pretty much set and cant go to 250? or is there some other thing i have to do?

Yep, sounds like 250 FSB is a no go. You might try 243 FSB, that would give you 3.4 gig.

try disabling HT. you might go a little further.