My first computer back in the mid 90s was an IBM Aptiva.
It had Pentium 133mhz CPU, 16mb RAM, a 1.2 gig HDD and not much else.

I managed to find another of the same, many years later.

I had to modify the case significantly, including removing most of the back panel, and 3D printing a new one, I managed to get it all in there.
System was a bit too powerful for the lack of cooling, so I had to take it apart in the end.