Screen flickering issues

Hi everyone, so since i've gotten my gtx 780ti my screen has been quickly flashing black everytime i click on something youtube related and then sometimes just randomly throughout videos, any ides as to why? Cheers

How do you do that? Also it's not coz of flash player, it happens when I click on links on here as well and just everywhere, when ever I click on something it flashes, but not every time, and sometimes the blackness lasts for about 3 seconds and sometimes forever.