Hi, guys! Just installed Tiger on my old iMac G3 (350MHz, slot-loading), but was a bit slow so I thought I could see if I could up the RAM. Inside, there was an Apple 64MB RAM card and a third-party 512MB RAM card that had been installed later (so 576MB in total). Did some research and it seemed that these models were capable of coping with up to 1GB RAM, with 512MB SDRAM PC133 in each slot. Purchased another 512MB RAM card from here and was delivered today. But I can't get the computer to see it. I've tried reinserting and swapping them all around, but no joy. I'm not very good with RAM, but was wondering if it was because this new card was somehow incompatible with the other two? Or how can I tell if card is defective or not? Or if it's even the right RAM? Any help appreciated!