I just put in another 512mb stick of ram into my G4 tower. For 2 years i've had it running 768mb of ram (one 256, one 512), and recently I finally got another 512 and put it in, giving me 1.25GB. That was fine. Now I got another one, to fill up the last ram slot, so I now have 1.75 GB of ram, but my computer keeps freezing up. I'll be playing music, using iChat, MSN, Firefox, Activity moniter, and maybe quicktime, and all of a sudden the music will stop, and the computer will just freese up. I don't know if it's related to playing the music, because right now i'm not playing music and it's not freezing up yet..... I better post this before it does freeze up. Do you suggest I take that ram out and see what happens?