128 MB in a 486 is insane. 16 MB was a lot in that era. I remember upgrading my Pentium II (!!!) from 64 MB to 128 MB, in order to not suffer death by loading screen in Diablo II.
The hard drive in that machine is still the original COMPAQ OEM version of the Fujitsu M2622F SCSI drive. In 1993, that was the entry base option for storage in that server, and I dare to say that it is typical Compaq tradition that the base level disk drive is just barely aedequate for the system. While that Fujitsu drive was a fair performer in 1991 when it was designed, in 1993 it wasn't that cool anymore. Granted, there were better options available, you could even get an EISA SCSI raid controller for that system.
And as a final remark: Diablo II was the reason my brother upgraded his K6-2 machine from 32MB to 128MB.
I ran a 486DX266 at the time and it only came with 1MB of SIMM memory.
Hell, I even remember upgrading it to 4MB of EDO memory was a big deal (and this was done purely so that I could run "Crusader: No Remorse").
And now I write software for a living. Good times.
I then had a Pentium 166MMX with 64MB (16MB was what was usually offered) which I recently upgraded to 80MB with a couple of sticks I found in an old box.
though in those days it was def. a different class of machine