@Martin:
Look at the Max values of GPU Input Power readings in the right table. (But I agree that it would've been nice if the OP had mentioned this from the start.)
Thanks Dalai, now I noticed it.
This is what the GPU driver reports, so the problem is there. Try to perhaps upgrade NVIDIA drivers if that will fix it.
My apologies, I should of been more precise. I'm using the default Nvidia driver installed with Windows 10 (432.00), I'll try updating it. I love your app btw, thanks.