Currently in my Computer I have two DDR PC3200 256MB memory sticks in my computer. I just bought a DDR PC3200 1gb stick for my comp. I put it in and it worked for a while but then it started to make my computer all glitchy and eventually just turn off by itself. My Cache RAM is 512 and I wondering if that was a limit as to what I can upgrade too or if that IS the limit and my two 256 memory sticks is all my computer can handle. Anyone got any ideas?