Hello... 80C is typical with a 560/460 what is you fan speed at that Temp? Sometimes the paper stickers/glue can show browning, with use over time.
Hey your asking alot from it in ultra mode, and it's working hard to give it to you
A simple test to determine if you need better airFlow through your case, is to remove your side panel, and look at temps and fan speeds agian while gaming.