I have a HP pav desktop with windows 8.1 and AMD A8-6500 quad core 3.5 ghz with radeon HD . 8 gb ram and I think 300 watts of power supply, The problem is when I start up my computer with the video card in it and hooked up to the VGA cord The computer beeps and the screen is black and I open up the side and the fans are running and so is the video card fan. can some help me with this problem?