I also have a PC based on the Rhino 12 motherboard and I can confirm that it cannot use PC-100 RAM memory. It requires either EDO or Fast Page memory sticks in both the SIMM and DIMM slots. Sorry. Doug At 7/22/2001 02:30 AM, Julie Scorer wrote: >Hi, >I have a Pentium 150 on a Rhino 12 motherboard and running Windows 98se. >The MB has 4 simm and 1 dimm slots and I had 48mb memory made up of >1x32mb dimm (Pc66) + 4x4mb simm. A friend who was upgrading gave me 1 stick >of 64mb dimm (PC100) Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com