There does not seem to be a way to select which graphics processor the temperature display is reading from. Issue is that if one has integrated graphics as well as a dedicated card, the display defaults to integrated. Disabling the integrated adapter fixes the problem, but would be nice to have the option to select the GPU Temp feed for the display.
I really want this feature as well. I am not sure how I can disable the integrated graphics on a Razer laptop at all...