Can BIOS update improve CPU temp?

How can BIOS updates affect the temperature my computer? It shouldn’t affect the temperature at all, except that it may have adjusted the parameters for the profiles for running the fans and used your previous profile selection with these parameters, and thus be slightly different (although unlikely).

Can outdated BIOS cause overheating?

Outdated BIOS: After few years, the computer BIOS might be out-of-date, which can cause overheating. … System Changes: Driver changes, Windows Operating System advancement or update may cause problems among programs, hence making the Computer too hot to use.