Hey, my AMD Radeon R9 390 is running at 100% fan speed and 90C when playing games like HITMAN Beta, Rust and so on, the games however run smooth, and I get 60-100 FPS. I was told to get an additional fan for my case, I am going to do that but in a few days, so meanwhile, can I play those games EVEN THOUGH fan speed is at 100% and temperature is at 90C or is it better to wait till I get my new fan?