...got my hands on some documentation (HP Advisor, Feb 1995, HP3000 edition)
and the last page says:
 
   CPU family  9x8        9x7        9x9KS      995
   ----------------------------------------------------
   Max RAM     512 MB     768 MB       2 GB        2 GB
   Max Disk    180 GB     328 GB     352 GB     2036 GB
 
 
:-) Eero Laurila - HP CSY Networking lab, NS services.