Hello Marken_Drafting,
I just ran a 10 minute RT with my Task Manager up. Windows 10 Home version. Wasn't able to see how many cores (4 physical, 8 logical, and I also have it set to use the max) my computer was using, but did notice that most of the processing (90 - 100%) was all done by the CPU with 1-3% done by the GPU. I think the CA software is not written to take advantage of our GPU processing power???? I am on Version X12 also. Sorry I couldn't give a definitive answer.