If your getting black screen or coloured lines that usually has something to do with heat or a dying gpu. i had a graphics card that also stopped 10 mins into game but it was more obvious artifacting. please specify exact graphics model and age of the card. also
download gpu-z and core temp and try to record some temps.
I just got this new gpu and i recorded the temps with msi afterburner and it stayed in the high 50s for all of it. In fact yesterday I was playing for a few hours without crashing then the next time i played i crashed in the first 10 minutes...
Thanks for replying.