I was speaking of the newest version of the FMC is a 486, the highest memory option is 1GB.
20M memory, Yes, with all of these coded procedures coming about, the navdatabases are having to get pared down. Getting pretty creative with waypoint naming, the usual nomenclature out the window.
The FMS for the smaller aircraft, with the Garmins and such, are far more powerful with up to date electronics.