The affairs don’t matter. The real problem (and why he resigned) is that Nvidia has been selling GPU’s to China through companies in Singapore despite strict US export restrictions. The asian woman he had an affair with had a company with her husband that sold these products from Singapora to China, which directly links him to the smuggling, something Nvidia has publicly denied ferociously all this time. Several key members of the US government have looked the other way (like Howard Lutnick), but might no longer be able to. If Nvidia was investigated it could seriously jeapordize a large amount of their oversea sales and could cause many issues domestically.