Hello, i have a weird problem, i bought a second hand Asus GeForce Gtx 570 and after instal it showed white lines. I read somewhere that maybe ram is the problem. I had 4gb 1600mhz, now i have a kit of 8gb 1600mhz. It is still showing white lines. I tried to instal the graphisc driver in win 10, half way into instalation it restarts and driver doesnt instal properly, the white lines disappear but it keeps crashing with wierd square blocks, i tried win7, the same isue, i have a 450w psu. What should i try to do to fix the problem?