If you really don't want to spend money, there's always GNU Octave. Sure, it doesn't have the thousands of matlab toolboxes, but if you're running code from 40 years ago it shouldn't need those anyway. I wrote a couple of scripts recently and then rewrote them slightly so that they would be compatible with octave.
The monoblock was a prototype watercooling block that interfaced with the cpu and gpu simultaneously. Normally if you wanted to watercool both components one would purchase seperate waterblocks for the cpu and gpu and then use plumbing in between the two.
If you really don't want to spend money, there's always GNU Octave. Sure, it doesn't have the thousands of matlab toolboxes, but if you're running code from 40 years ago it shouldn't need those anyway. I wrote a couple of scripts recently and then rewrote them slightly so that they would be compatible with octave.