ok, according to my mobo's manual, i can have 1 SS/DS DIMM on slot 1, or a DS/SS on slot 1 and a DS/SS on slot two, or I can have 3 SS, one on each slot. Is DS/SS referring to single/dual-channel? if so, does this mean I can't add just one more stick of ram to my comp? (my processor doesn't support dual-DDR, or so I've been told)