Crucial says you can: http://www.crucial.com/store/listparts asp?Mfr%2BProductline=Apple%2BPower+Mac&mfr=Apple&tabid=AM&model=Power+Mac+G4 %28Dual+867MHz+DDR%29&submit=Go So does Kingston: http://www.ec.kingston.com/ecom/configurator_new/modelsinfo asp?SysID=12306&mfr=Apple&model=Power+Mac+G4+Dual+Optical+867MHz+%28Mirrored+ rive+Doors%29&Sys=12306-Apple-Power+Mac+G4+Dual+Optical+867MHz+%28Mirrored+Dr ve+Doors%29&distributor=0&submit1=Search Hope that helps. Chris -------Original Message------- On Apr 19, 2006, at 1:17 PM, Brian Parker wrote: > Is it possible to run more than 2 gigs of RAM in a dual 867 MDD? I > had > always thought that was the max but I read something in a user > forum that > lead me to question it. I wondered about that also, considering they make 1 Gb sticks now. Maybe the memory managers in the MDD's don't know how to use them? Would be nice if they could. Just a message from Doug...