my asus z87 rog maximus vi hero is only detecting one of my graphics cards the 2nd pci-e lane is not working . I just ordered another asus z87 rog maximus vi hero will I have to reinstall windows ? also the asus z87 rog maximus vi hero I am getting is a open box from newegg.com . I know all the accessories will not be included but is there a chance they will send me a defected motherboard that dose not work ? and does newegg.com check them be for sending them out ?