I was wondering weither i can have two different types of RAM in my computer at the same time. I would have 2 x 512mb in the two white slots, and 2 X 256mb in the two black slots. One of my friends said that its ok to try it out as the worst thing that can happen is that your computer goes 'beep beep', one of my other friends however, told me that my computer could totaly break if i were to try it and it didnt work.