Well there's theory and Therory
I swapped back to the old 700mhz and tried to reset Cmos/bios settings to run the Celeron 1.3mhz. So I swapped to the 1.3 again and still would'nt run
It was a bit like "put your left foot in and shake it all about, do the hokey pokey" and it still wont work.
Might try to find someone who is running a 1.3mhz in a similar board.
Cheers
Chris