Is the -006 at the end of the model number printed on the chip? I have a 100MHz crystal on it's way so going to give this a try.
Currently it's running at 80MHz, no great loss if it doesn't work. If 100MHz is a no go then 96MHz would be the next thing to try?
Hiya,
Yep you have the latest mask with that baby, don't worry

Like I said above, it's not just the chip, it's also down to other things like the chipset on the card and more importantly the memory on the board.
Your board has a very rare 50ns SIM so it *should* be able to handle 100Mhz.
I recently upgraded my Blizzard from 75mhz to 80Mhz but went through 3 different SIM's to get it to go that fast (Blizzard's aren't so happy to overclock as Apollo's because of the way they talk to FASTRAM).