Okay so i bought a gtx 960 4gb on newegg and i used it on a dell xps 8700 no upgrades beside the card. it worked for a week and then one night in the middle of playing games on steam the computer screen kept going out i had to keep restarting the PC. And it got to the point where i couldnt even see the screen anymore after restarting my PC so i put my old gt 720 1gb in and it works fine i sent my 960 back for another one i'm scared to put the new one in the computer what could it have been? could the motherboard screwed my graphics card? or maybe it was just a bad card? please help me out and thanks.