...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.