I'm trying to manually set up my memory timing rather than rely on the auto setting in the BIOS. I have found tRCD, tRP, and CL for my Micron MT16VDDT6464AG-40BC4 (PC3200 512MB). I can't find the tRAS spec. I checked the data sheet, and it doesn't give a nice number of clock cycles for tRAS, if just specifies a huge window of values in ns, not clocks. Wondered if anyone knew where I could find this info (or work it out from the data sheet).