It is more efficient and better off to have two of the same RAM sticks to avoid problems such as kernel panics like the other guy said. I avoided many performance issues with 2 512MB sticks on my iMac. If you need to upgrade the RAM in your system to 1GB, I suggest you use this site below. It is a site that actually still manufactures parts for older PowerPC macs, even macs that go all the way back to the Quadra series! This website is very trustworthy. I bought from it many times, and they have warranties for every product. Trust me, you might find some whacky stuff in here such as a modbook. A modbook is a fully touchscreen laptop they make out of macbooks, ibooks, and powerbooks. it costs around $800 to make one using the one you have, or you can order a new one for $1100.
http://eshop.macsales.com/item/Other%20World%20Computing/100SD512328/ Also, make sure you get a firmware upgrade. That will help too like i explained earlier. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list