On Dec 29, 2009, at 4:48 PM, Bruce Johnson wrote: > If the stick actually fits, then faster ram can be substituted, > generally speaking, for slower; all that happens is that the RAM does > not run as fast as it's rated.
Yes, this is true that you can use faster RAM in all slower computer, and generally speaking you can't use slower RAM in a faster computer, BUT, I've seen slower labeled RAM, for example a stick labeled "PC2100" that was really a re-labeled "PC3200" stick and all the chips were the faster PC3200 chips. Evidently sometimes the manufacturers either run out of the slower stock RAM or perhaps quit making it, and then label the faster RAM with slower labeling. You'd have to look at the chips to see, but it does happen sometimes. Also, some Macs, for example the Beige or the G4 Mini only use "low- density" modules with chips on both sides of the module, while others can use either low-density or high-density, so that's another consideration that could cause a module that "fits" the slot to not function. Also, dual-channel RAM such as used on the G5 must be mounted in matched pairs in the correct matched slots, and are often VERY finicky and can require reseating and rebooting many times before the matched pair are recognized correctly. If you use two different sizes as a "pair" you'll only get the smallest size (x2) IF they recognize, which isn't likely in my experience. -- 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 [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
