1998. It had 4Gb of RAM in each node which wasn't that scary. Most of it was UPS and disk.
I had a Sun 1000E [1] for 3 years as a workstation from 1996. 8x 50MHz CPU, 2Gb of RAM, 16Gb disk array. It was made in'93 and was approx 12U for the unit and array. Things weren't that big in the 90's. 80's yes...