black screen on zotac gtx 1060 6 gb mini itx

Hi folks, a brief description of the problem
system unit - the mother(Н110М-K) operative DDR 4 2x4 2133 MHz,percent of і3-6100,gtx 1060 6 gb, standing before 960 EVGA mini,Detech jx500A PSU (500w)
bought new sealed from Poland,just check formaram,the core frequency is instantly 1911Мгц 1708 in bust, worked 15 minutes like the rules ,don't pass out,run the Witcher 3 on ultra ,after 5 minutes black screen, and the com began to buzz strongly,rebooted , ran the Witcher - the same thing in a few minutes, reduced the frequency of using msi afterburner to 1708 as it should be played much longer - 45 to 55 minutes ,the same thing happened, as if the driver vidyuhi took off,black screen and rumble vidyuhi not heated above 70 degrees in the game, so it's not overheating, dust there is none - it's new, if there is not enough power PSU then why it does not immediately cut down , through 50 minutes?I will carry in service . Anyone any ideas what it could be?