So I bought an 8GB 8x1GB set of Crucial RAM off eBay for my PowerMac G5 Dual 2.0GHz on eBay and it may be faulty, but I just want to see what you guys think first before I email the seller. When I first removed the 4 256MB sticks already in the PM, I put in all 8 sticks. Booted the computer, no chime, and it tried to load but would either freeze at boot or load OS X but instantly kernel panic. So then I removed one stick and the PM booted fine. I opened System Profiler, and then it showed 2GB RAM installed which was very strange because 7GB was installed. The "Memory" section showed 4 slots (DIMM 0, 1, 4, and 5) to be empty, while the other 4 showed to be 512MB...which I found to be very odd. I know that can happen with high-density RAM but this was advertised and shows up as low-density on google. Anyone know what else I should try? Memtest says I have 1064MB of available RAM. BTW, the RAM is 8 sticks of CT12864Z40B.