I am pretty good with computers, but I am not sure about this thing. I have a dual channel board, and right now I have 1gb of RAM (2 x 512). I still have 2 more slots to fill, but I cant find the exact RAM I have at newegg anymore. How do I go about filling the other two slots with RAM? Do the new sticks have to be identical to the others, or do they just have to be ddr 400? Cuz I dont know if the RAM timing has to be the same and stuff like that. They are Trancend ddr 400 (pc3200).