Mac Mini G4 RAM upgrade issue

[Cctosh]

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.

I know its been 7 years... but i think you might rest easy knowing that today i just upgraded my G4 mini's ram with a 1GB ram stick..... the exact same one from the exact same company. And wouldnt you beleive it: it reads only 512 mb!