I have a CyberPower Quad Core Gaming PC and It came with the graphics card inside. I am not the best with Graphics cards but how do I know if it is installed? Also when I have the graphics card inside the PC it says there is no signal on my Monitor and when i take it out it's all fine and my PC runs. Is there something wrong with the graphics card or something? Guys if you know the answer to this please comment below and help me with this problem! Thank you all!