I use a academic research license, I'm using ANSYS for my masters project. The CPU and RAM clocks are factory default.
I will try to stress-test the system with Prime95. I'm not sure that it may be a hardware problem, though. I have successfully ran different, big models (not cables) on this machine. I suspect it may have to do with having a very large number of realsets (for each contact pair), or something like this.
I can share an input file, just to check if it runs successfully on another machine. Can I send it to you directly ? However, I really don't expect my model to converge as it is.