Astala, Its a little too late for me to send the ram back. I was planning on upgrading to 2x512megs in another month or so but it looks like i'll be doin that sooner now. Oh, and Dell can go to hell. Punto, I figured it was the ram, i just like to get opinions before i make an costly changes. I'll have to check the compatibility of the ram with my system, its muskin black which should be fine but i'll check anyway so i know what not to get when i buy again. And yes, i meant 3901