By setting “Multiple GPUs” in the UI, it seems to use the Nvidia GPU. But just a little bit : never more than 5-7% That beeing said, CPU usage does never go beyond 40% (and integrated GPU never beyond 40% as well) while rendering is however currently computed (like after zooming).
How can I make Darktable use all the resources on my Windows 10 PC ? As it, it does use less than 25% of it and it sluggish, as a consequence.
EDIT : after plugin the AC power, ressource usage grows. So it is perhaps a power management issue, related to the OS. I’ll check that.