An older machine I have has a SY-7VCM. http://www.soyousa.com/products/pr [...] ?t=d&id=18 It has only single-sided RAM in it now and recently I tried some double-sided RAM. It did not work. It's possible that this board simply does not support double-sided RAM, right? How can I be sure? --Mike P.S. I would like to put a pair of 512s in there. This may be difficult or impossible if the board only supports single-sided RAM.