I'm looking to buy a gamer a GPU on which I can run machine learning while he's not playing his games. This naturally lends itself to something like a "screensaver" that, rather than doing anything intensive with the screen, runs when the system is idle and pauses when he's using the system.
Since I'm not the first person to have thought of doing something like this (I'm almost certain), and since GPUs can be so expensive, it seems likely to have been a previously solved problem, at least for Windows 10. However, I've not found anything thus far.
Is this an unmet market or can I buy it off the shelf?