only works HWprogramer “1.8V” in best SKYPRO or similar quality flasher
i mod my MXM-TDP and all works nice “no signature corruption” 
GOP remove ? - CSM BOOT - VGA MODE - LEGACY ?
or try last GOPup “app here on forum” this is possible flash in NVFLASH for repairs UEFI problems 
,.,.edit
or like my MSI - GOP status “VGA is hybrid vbios” gpu-z shows bad info ,.,hwinfo or nvflash is ok
all about nvidia gop / app in last posts