I have a stick of 512 DDR that I bought about a year ago from compusa. I think its pc2100 but im not sure. I never thought twice about it until now because im starting to get into overclocking. I have tried everything from going over the stick with a magnifying glass to d/l mem diagnostic programs, system info programs, sisoftware Sandra and so on. I cant figure out what the hell type of mem this is. Every thing just tells me is 512 ddr. I already know that. Any ideas on how to find out what type it is???