They need to fire him outright. The company needs to set the example that misconduct won’t be tolerated at any level. Keeping him on in anything but a transition capacity would be a mistake.
Frankly, has he broken any law?
I don’t understand you Americans; you live in a disproportionately violent society, tolerate all sort of abuse and manipulation, then will scream hysterically at anyone having an unconventional sex life.
Most people couldn’t care less about him having affairs. Sex is part of life, and affairs are pretty common.
The bigger issue is the conflict of interest stuff, but until that’s proven this is a horrible look for NVIDIA if they actually go through with it.