CPU usage at 100%, slower baking, but system remains responsive and usable for other tasks.
CPU usage drops to 15-20%, faster baking… but system is extremely sluggish and basically unusable for other tasks.
This seems a little counterintuitive, although I’m sure there’s a perfectly logical explanation that involves shuttling data back and forth between the CPU and GPU and whatnot.
However: is there any way of improving system responsiveness when using Cycles GPU baking?
FYI, the computer is a quad-core i7 (8 virtual cores) running Win 7/64, 12 GB RAM, and an nVIDIA GeForce GTX 660 Ti (2 GB)