Video card problem with hp pavillion f6620f!!!!!!?

Hi



i just bought an HP pavillion p6620f and a power supply corsair cx 500w and an XFX HD 5770 1gb DDR5 video card and my system do not detect my video card once in windows 7(device manager) but my monitor is currently plugged in the video card and it works, i have an image but without a driver installed.... i cant install them cause my system do not seems to detect it (in the device manager).....



plz help me!|||Need to go into BIOS (Set-up) and disable on-board video and then set primary video to PCIe.