Recently, I bought a 1 GB standard DDR ram stick for my old Mac mini G4, looking to re-purpose it. Everything seemed to be going fine when I began to install it, until I restarted the mac to find that only half of it (512 MB) is working. I found this very strange, considering the previous RAM stick was 512 MB by itself, and it worked just fine. I looked up a video guide to compare my results to, and it seems that I did everything in the installation process like I should have. I also re-installed 10.5.8 just to be sure it wasn't a software issue, but it didn't help. Is my new RAM stick defective? Did I not install it correctly? Maybe I skipped a step? What can I do to fix this issue? All responses are appericiated.