Well I got my 4870 today, put my cooler on. Have everything on and tight. When I boot up, the post shows. Does a single beep then my monitor goes blank after post and the rest of the computer is booting but the video card doesn't appear to be sending anything out. I hadn't uninstalled my previous drivers which is what I'm doing now. But when it does show post, it shows the screens with a couple yellow dots flickering around the screen. Any Ideas?