< I gather the G5 PowerMac's like I have don't like marginal RAM.> I have heard the same concern on other lists, so it pays to use a vendor with a very good return policy. I have had personal outstanding experience with Data Memory Systems (http://www.datamem.com/) and I wouldn't hesitate to buy from them--plus they are usually among the lowest price dealers. If their memory doesn't work, they make it right--when you call, a knowledgeable PERSON answers! And their FAQs are a great source of general and specific data on memory. Oh, I should have also mentioned another shopping/price comparison site, one where you can see brand name prices as well as generic: http://dealram.com/ Steve in Raleigh