Hi Per well, my information is this: 32-bit chip architecture can address up to 3.4 GB of ram, which is the limit for the current C2Ds. So, essentially you could put in 4GB RAM and use 3.4GB of it. I believe this is also true for Windows. best regards Buzap -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01