On Apr 23, 2009, at 10:28 AM, ronald basford wrote: > Question - i have 512mb of ram - can i install a 1gb chip along with > the 512mb bringing the total ram to 1.5gb? > Yes, as long as the other RAM slot isn't dead (a lot of PowerBooks in that era had one dead slot). Before ordering the RAM, try the 512 in the other slot. If it works there too, order the new RAM. Jim