HI everybody! But, you can use standard Fast Page Mode (FPM) parity 72pin simms in those PS/2 series and that L40SX. After modding the presence lines to proper settings as shown in that webpage: I have number of machines that requires this mods to ram sticks so they will work in them and really save a brundle. I pay about $25 CDN a stick for generic 4mb 70ns types with this specs. And that are from my local computer reseller. http://members.aol.com/mcapage0/mcaindex.htm Jason D.