My sister brought me her desktop and wanted me to reformat it. After reformating the hdd I desided to upgrade the memory from 128 to 384. The stick of 256 memory I got doesnt seem to work with her pc. I was wondering if this model emachine has something different than regular PC133 SDR DIMM? And if it does, what do I need to buy? The computer is a 1ghz machine so I think its well worth upgrading. Any ideas would be great, thanks!