Not to mention all the boards that the CPUs and RAM took up. Here's a nice photo of the insides of a VAX 11/780 - if you enlarge it all the way you can see the annotations showing which boards do what:
https://upload.wikimedia.org/wikipedia/commons/e/ec/SPEC-1_V...Note that those 16 huge memory boards each held 256K (kilobytes!) for a total of 4M of RAM.
Photo with people to show size of cabinets: https://photovault.com/363660