Athlon 1.2 266 FSB on a A7V

I have an A7V board (not hte 133) and want to get a 1.2 Athlon on it. First can I go any faster on that board and secondly can I use a chip that is 266 FSB on a board that is 200 FSB? I don't think I can in either case. Some guy told me the other day that he had a 1.3 on a A7V and it ran fine. I know that the dipswitch multipliers only go up to 12 so how could you get 1.3 out of it.

Thanks for the help.

Matt