Okay, sometimes, not all the time, my screen will show random colored horizontal lines. Sometimes they just sit there, and sometimes they just flash across the screen. There are also some vertical lines sometimes. It can happen at anytime even during the booting up. I need help with this. I described my problem to one guy and he said it might be a memory problem and I was kind of shocked to hear that because I would think it is the video card, but I really don't want to have to replace the video card. This video card has given me no problems in the past and it is quite good. I already know it isn't the monitor because I have tried multiple monitors. Please help me!