Gpu Faulty ? monitor losing signal, please help!

gutoahs

Prominent
Jan 1, 2018
5
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Hi guys, To sum UP, I bought a gtx 1070 used, recently.. and It is working really good to non-heavy games e.g league of legends, Skyrim V etc.
but when I try to play a game that requires high video performance, the game will run smoothly, no lag etc. but within 2,3 min I lose monitor signal, gpu fans start to spin real fast and thats it, black screen.. cant do nothing, need to restart. (BUT fans and gpu fans still spining).]


EDIT :
I underclocked my gpu to minimum allowed on msi afterb and I could play for 2 h. but that bug came again...
I had to underclock the memory as well..
still need help
i7 4790k 4.0
2tb hd
gtx 1070 8gb
16gb ram (generic) samsung
fonte 750w generic.
cooler hyperx evo
asus h85m-e

already tried changing sticks. and unplug gpu..
how do I proceed? thanks