Will Daz be supporting TCC mode for GPUs?
TCC mode is used to force the GPU to become "just cuda-processing 3D hardware", instead of being treated as a "3D Video display driver", managed through windows new WDDM v2 "Video-pool", which attempts to use all your GPU memory as one whole "chunk", but reserves illogical levels of VRAM in the process, limiting and slowing down GPU rendering by 10-20%.
For WIndows 10, this gives us back our full memory and procesing power again, where the latest updates has taken it away, and it can't otherwise be restored. Because Windows doesn't believe users need the OPTION to NOT USE WDDM "Unified driver mode".
Currently, at the moment, IRAY does, but, through Daz3D, it fails. The cards render once, real fast, then Daz3D can't seem to read memory settings or "purge memory", from the cards. Resulting in, or caused from the cards "dissapearing", with unspecified errors. (At which point it falls back to CPU rendering.)
I did manage, with a few restarts, and time, to get the cards to be seen again. However, it was impossible to tell if they were going to fail, or not, without seeing the logs, before each render. (You should see that it is constantly giving errors for the iray preview, and will thus, fail to render with the cards.) Nothing in Daz3D actually indicates the cards are actually "ready". If they exist, they can be selected, but existing and being able to run, are not the same. Talking about the advanced settings where you can select the dead cards that are clearly still throwing failure errors.
I do get some speed gains if I set the "3D rendering settings" in the NVIDIA control panel, to "Optomize for compute performance", and set PhysX to the CPU, instead of using the GPU for that. (Which consumes Cuda-core cycles. If it is being done on the GPU.)
However, when I set my two "non-display" cards into TCC mode, as opposed to WDDM mode... That is when the trouble begins with Daz3D.
Supported by "Pascal" and "Volta" architecture, Titan-Xp, Titan-V and various other professional cards, all gain greatly from this mode. I am unsure about the 1080 series, 1070, 1060, 1050, 1080-Ti...