i've been using MSI afterburner to undervolt individual GPU. i have 4 GPU.
Is there another software that can undervolt Individually for non amd cards?
MSI afterburner has been keep resetting my setting when i start a GPU focused program.
Most people have better luck with MSI Afterburner, but there are other options. You can give EVGA Precision X a try here. Sapphire TriXX is another overclocking tool that may help here. There may be others but these are the three that I have used in the past.