One thing thing to mention. Not all board support the same size ram in all slots. It argued with a Pentium 166 PC for a while and finally realized that it supported a maximum of only 96mb using SDRAM which is why the two sticks of 64mb were not working in there together. They would work in either SDRAM slot by itself but not together. Found that I could run two 32mb just fine but NOT two 64's.
Check to see if there are any limitations on what size ram goes in what slot. Also some computers will not like double sided RAM and single sided together at the same time.
