For some reason I cant put 2 sticks of Crucial 512mb DDR 3200 in it its extremely unstable but I was ablt to put 2 stick of DDR 2700 256mb a piece and 1 sitck of 3200 DDR 512mb and so far so good WTF is up with that? I thought one of the 3200's were bad but I tried both of them and they work great when their not together