Hi! I just went to put some more memory inside my Early 2005 dual 2GHz G5. I currently have 2x 1GB Patriot ram sticks that are PC3200 running at 400MHz. I had put in a 512MB stick of Buffalo PC3200 400MHz Ram in the 2 slot, and a stick of Samsung PC3200 400MHz ram in slot 3. I tried with other sticks that I had around and not one has worked! Any ideas?