64bit AIX Catia has an address space larger than 3gb (R14 or 15 upwards I don't remember which) and 64bit Windows Catia (R16 anounced but not yet released to the masses) will give access to 8gb of process memory space by default (64bit xp defaults)
Depending upon the complexity of the individual component parts, we have seen ~8-14K parts on 32 Bit Windows an AIX. On 64 Bit AIX (V5R15), we have been able to load ~18-20K parts. Could have been more (maybe), but that was all we had. With that many parts on screen, what started to kill us was the graphics performance with that many triangles on screen.
