10.5 x 133
If it posts, super, if it loads windows, even better. If it locks up, or crashes, up the voltage til you can stabilize it using up to 1.85v. If you can get there, and it's stable, try for some more, using more FSB.
Don't go there if you don't have a good HSF.
BTW, for a 1.2GHz, going to 1.4GHz is fairly common, so that is why I used a conservative example. 133MHz fsb keeps the buses in spec.