I am building a budget build. I bought a new pentium g3258 and a new gigabyte B85M-DS3H-A motherboard. Then I went and bought a used gtx 670. So the problem is that when I start the computer the resolution is something like 720p insted of 1080p. And I can not change that. And when I start a game I get lower fps than without the gpu . So for example, when I play without the gpu I get 30 fps but when I play with the gpu I get like 6 fps.
Does someone know what the problem is or what I can do to fix it.
Help!!