Yea, you can use simms and dimms at the same time... a lot of older mother boards support this. I have a secondary system that runs 1 128 pc66 dimm and 2 32 simms Brent On Tue, 29 Feb 2000, Javier Grijalba wrote: > > Can I use Dimm and Simm at the same time in my PC?? > Somebody told they are uncompatible, is this true? > Sorry for the OT. > Bye > Javier > > > > > >