I got a gigabyte GA970A DS3P with Fx 6300 processor. GPU is MSI r9 270x gaming 2G 2Gb .ram corsair vengance 2 * 4 GB . PSU of 550 watts. I got a grey screen after installing GPU drivers and the system frezzes. Anyoneee help . I tried out many things changed the driver ,checked the 4 8 pin connection I am using a VGA converter and my motherboard doesn't have any onboard GPU. It has a uefi dual BIOS in it. Any one tell me what to do?????