My experience on the dying GPU (Asus GTX 560) which had died was i had a bluescreen,when i'm playing CS GO,and then when i restarted it,the resolution went to 800x600,so i updated the driver,and it worked again. So i turned my pc off,but when i turned it on again,the monitor cannot detect the GPU,and after i switched to my other PCI Express slot,it still can't detect it. So i bought another Graphic Card.