I stuck a gig in my pIII 700 98-SE machine just for $hits and giggles, but guess what! it booted up, I saw the gig on the POST, but When I got into windows, i couldnt open any applications because it said I didnt have enough memory!
Can you believe that?!?!?
I backed it back down to 512 and it is fine. 768 dont work either. 512 must be some kind of limit as someone else just said.
Just an FYI if you are seriously gonna run out and pop a gig in your case. I have 2 sticks of PC133 256 meg ram sitting around waiting for another machine now!