I actually have a 770M and 780M both flashed to the MSI VBIOS and both will hang at the Windows 7 Welcome screen after the modded or even unmodded video drivers are installed.
I have tried flashing the VBIOS to Clevo and get the 8-bit color scheme sam...
I have tried flashing the VBIOS to Clevo and get the 8-bit color scheme sam...