if you opened a 15k model in it indi it'd most likely crash on you anyways - the limit is 16k but it seems to not like going over 14k.
and due to the pipeline you run anyother version than 1.6.5 and more than 4,000 polygons causes major slowdowns unless you had a beefy CPU (because until 1.6.5 the smoothing calculation was set to use standard 32bit processor calls and rather than similtanieously doing all of the smoothgroups and then putting it on the vertex normals it was being calculated per vertex per face in a runtime.
slowest computer fullstop i'd recommend for both would be a
233Mhz w/mmx or better
32Mbyte Ram
8Mbyte Graphics chip (anything except an SiS model!)
DirectX 7.0a
Windows 95b or better
Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?