Finally got around to it. 4 year old Win10 system V1809, I7 6 cores, GPU Nvidia GTX 960.
Denoise AI 2.0.0 sample test speeds:
GPU = 55 seconds, only 1-2 sec diff with memory low, med, or high.
CPU only = 140 seconds
CPU + OpenVINO = 25 seconds !!
Like others, I see obvious and measurable differences in results, with CPU stronger, more noise removal than GPU at identical settings.
CPU+OpenVINO results are slightly different than CPU only, but not significant. This makes no sense to me, but I'm no GPU expert and never heard of OpenVINO before.
Arlen: You have to disable the GPU option to open up the OpenVINO option. It remains grayed out until you go to CPU mode.