Hi, motherboard is Gigabyte GA-B75M-D3V, rev 1.1. Sapphire is a PCIexpress and only 1 slot available on mobo. Fans are spinning on the Sapphire. Did not see any lights on the Sapphire and do not know if there r any in the 1st place. Before all this, my son informed that pc hanged, then unable to shut down. Then when I took over for simple troubleshooting, found that spare hdd is having bad sector, then display adaptor is also not showing in device manager for Sapphire. Reboot pc, intermittent boot up, or very long time to display windows logo, can only see black screen with movable cursor. Remove spare hdd, n able to boot up properly. So, I think I got 2 problems on hand, one is confirmed hdd, the next is graphic card.