You cannot measure the temps inside of the PSU and the High Performance setting that you had is guaranteed to heat things up inside the PSU.
Golden rule #1, if a computer is running ok you should leave well alone so please do.
Once Windows has been installed, you install the necessary drivers for the MB and other hardware and then leave well alone, drivers should not be allowed to auto update and you should never update any driver/s unless the new drivers are intended to resolve a specific issue that you are having, installing new drivers unnecessarily can actually cause you the very issues that any new drivers are intended to resolve and uninstalling the new drivers may not resolve the problem/s that installing the new drivers has caused.
Depending on priority it can take many months before the driver provider releases any fix and depending on the age of the hardware or software concerned they sometimes do not even bother or may have already announced an end of support.
Just so that you are aware, we do not leave threads open so if we don`t hear back from you by Wednesday your thread will be closed until you send one of us a PM to reopen it for you, we have to have this policy due to the amount of abandoned threads free forums get