GTX 780 Ghz edition and 144hz BSOD.

[chrkon]

When i use 144hz on games i get bsod. Whatever driver version i use ... with 120hz and high settings everything is good . 120hz and ultra settings bsod , but only on games .3d mark - unigine no crashes on 144hz.
I have tried almost everythng (clean install O/S , clean install drivers,cpu torture test,memtest) , faulty gpu or faulty psu?
Plz help!!!! 

[chrkon]

For some reason once i try to use any of the above settings my system crashed. After 2 weeks or so i found that one of my ramstick is defective...
I think i ;m good now , just an advice for everyone who is reading here:
FOR HIGH END SYSTEMS USE ONLY QVL MEMMORIES!!!