GPU Fan Speed is --
With latest NVIDIA drivers 416.16 NZXT Cam doesn't show Fan Speed (always --).
I've reported this since GPU fan speed was added and I've had 2 different GPUs, and a reinstall of windows.
Also - I have an RTX 2080 (Gigabyte)
Same problem here. I thought it was the firmware update I did on my card, until I noticed that ONLY CAM has the problem. Every other piece of GPU software detects the GPU Fan RPM.
This is happening to me too! Driving me nuts. I tried to uninstall/reinstall multiple times. I tried rolling back my nVidia driver and Windows update but CAM always shows GPU as '--' now.