so a couple months ago i sold my 2 gtx 760 gpu's to a friend, i havent yet got anymore graphics cards, and i noticed after setting my pc back up from a move, i have some really bad lagging problems just doing basic web searching. can this be due to the fact i have no graphics cards? just the onboard graphics in the i7-4770k? or maybe some settings in the bios? ive got an asus maximus vi formula and 16gb of ram. not sure the problem. thanks in advance.