I believe that if you buy the PC800, you must buy a pair of those and you cannot mix them with the PC700.
eh?? from the page that minendo found, it says up to 1 GB3 of PC700 or PC800 RDRAM, but I can't mix these two??
also, how do you tell if what i have originally is pc700? the thing is covered by a heatsink, and the only number i can find on it is 100....