This started happening when I got my gigabyte g1 1070. The first day I installed it there were no problems. The next day I turn on my computer and start seeing white lines randomly flashing on my screen. I can reliably get the lines to show up by moving a chrome tab between my two monitors quickly. After trying a reinstall of drivers and reseating the card I still had the problem so I sent the card back. Now I have another g1 1070 and the same thing is happening. When using my gigabyte g1 970 I do not have this problem. First day no problems second day white lines are back. My specs are 4690k cpu , Gigabyte z97 gaming 5 motherboard, EVGA 750w b2 psu and 16gb hyperx savage ram.