168-pin 512mb support Based on my knowledge and information . . . The sis630st supports one, 168-pin DIMM socket to a 512MB max. I am not aware of a greater than 512MB architecture for the sis630st. Available RAM is dependent on the architecture (physical characteristics) of the mobo (i.e. chipset, RAM configuration, processor - the "wires" if you will). It is the architecture that determines how much data can be travel through all of the system busses at any given time. Thus if your mobo maxes out at 512, you cannot make it (flash, e.g.) handle any more data at a given moment - there are not enough "wires" to carry any more data. Thus the Windows page/swap file. Monk