I just added http://www3.pny.com/2GB-PC2-6400-800-MHz-DDR2-Desktop-DIMM-P2390C31.aspx to my exsiting system RAM (that is a different brand) I have 2 sticks of RAM in two of my black slots and the 2 new sticks in the yellow slot.
Now the comp freezes randomly.
Now the comp freezes randomly.