just turn the onboard gpu off in the bios, and see what happens.
i see no option to turn it off.
only thing there is is to set the display priority auto/onboard/pcie/pci
and the amount of ram the onboard uses
did you choose pcie?
yeap and it didn't help
have you uninstalled the intel gma drivers before installing the nvidia drivers? removing all graphics drivers, booting up and reinstalling the nvidia driver doesn't work?
had the same issue on another PC with same build
so i tested the no GMA driver, and it works.
still, pretty fubar if you ask me, that a bios update causes such issues.
Intel phone support told me to put in a CPU without graphics support