I have a PC with intel HD grafics, and i decided tu upgrade it with a Gtx 560. I instaled the card in the mothderboard but windows 8 is not recognizing the card, i tried downloading the drivers but when im goig to install them, i get a message error saying that i dont have the apropiate hardware.. in control panel i cant see the graphic card anywere and when i conect the monitor to the graphic card, it says "no signal". Any clues? (The graphics card's fan is working when the PC is on)