The highest supported by D815EEA processor?

Hi!

I've got a pretty old piece of hardware - it's Cel 733MHz on Intel
D815EEA motherboard. I'd like to plug into there some more powerful
PIII processor but wonder if it's supported. The official site says
that the Pentium III Coppermine up to 1000 MHz with 133 FSB is
supported _but_ other processors may also work. So, does anybody have
experience of plugging there unofficially supported processors? If
yes, what for the processor was it and did it work?

Thanx,
Max