Hello. I built a pc 6 months ago utilizing a Asus Strix 1080ti. Mine works perfectly, nothing wrong with it. However my friend has exactly the same card that he bought used online and after about 2 games it stopped working. When I plug it in the card lights up but does not output an image for the monitor nor does it allow me to utilize the hdmi on the motherboard. Basically it highjacks the motherboard without working. Any ideas as to what component on the GPU is the issue?