progressive gpu lightmapper keep crashing

my lightmapper is really weir.using cpu to bake light took me an hour to finish.so i try using gpu instead.but every time i try tobake it crash within few second.i searched most of the post that counter the same issue and try many possible way i can think of to fix it.

my gpu is gtx1050 and i checked there is no other internal graphic card.no second monitor.i haven't try reinstall editor yet.but i dont it would work.

sorry for my poor english.im still new in unity and keep messing thing while making game.and so far some issues that i have counter with, most of them are solved or avoid it