Gigabyte s-series motherboard - GA-M61SME-S2, AMD Athlon 64 x2 bios. I purchaed an additional 2 gb of ram but the system does not recognize it. I have tried several different brands and have also tried putting same brand in both slots - nothing seems to work. Only the memory in slot 2 is recognized. In fact when I put the 2 gb stick in slot 1 the system won't even boot. It just beeps 3 times repeatedly.