I have 2 sticks of Kingston KVR1066X18-8/256 RDRAM in my ASUS P4T533C. I\nbelieve that these are 16-bit ECC 184 pin modules. I would like to add\nanother 512MB of memory but I have a few questions first.\n\nCan I mix non-ECC memory with the Kingston ECC?\nWhat is the equivalent Samsung module? I think that it is the MR18R1628DF0\nbut I'm not quite sure.\nWhat is the difference between 16-bit and 32-bit? Can I mix the two types?\nWhat is Dual Channel RDRAM?\nWhat type of memory would you suggest and where can I buy it?\n\nThanks so much...There are some very helpful people here.