I currently have an Asus P4S533 motherboard with two Samsung 256 DDR (PC2700) installed. I want to add additional memory but I'm confused as to what I can add. The mobo manual states "Only 4 banks of PC2700 are supported". Does this mean I am limited to using only 2 of the existing 3 memory slots (if using PC2700) or can I add an additional 256 DDR (PC2700) in this third slot? I had this computer built and this is the first time I try to add additional memory. I've been all over the Asus site and can find no explanation of what 4 banks being supported means. Thanks to anyone who can help!