So I got two 512MB RAM sticks for my G5. Currently I have the original four infinion 256MB sticks. Today I got two 512MB Infinion RAM sticks. I stuck them into my G5 and they do work, but are read as 256MB sticks. So, I'm thinking I got gyped and they have fake labels. But I was also thinking, maybe the G5 just doesn't recognize the change? I mean, It's had the same sticks in it for the last 11 years and it looks like this is the first time they've been removed. So, I'm not entirely sure. I've also never done a RAM upgrade in a Mac. I've only ever done this stuff in Windows PCs.