so i have a sapphire r9 270x 4gb oc eddition graphic card. evrythng was fine till this evenin. when i thought of clean installing my os again. i clean installed my os thn motherboard driver and thn my graphic driver from the driver cd that i got with the sapphire pack(last time it work well).. but this time dont know why... my grphic card is not getting by the ststem. it shows only running standard VGA adaptr...in device manager. what should i do? help?