So the question for support of more than 4GB by the HAIKU OS is about the same as: Where were you when Bill Gates told the world that 640 kB of RAM was enough for everyone? ;-) And the possible solutions are: "Wait" or "Implement" regards, Arnold (Owner of a system with a Floppy drive, but thinking of a replacement/upgrade system with more than 4GB of RAM and a 64-bit processor that also could be AMD not Intel.)