84C is quite hot though! and getting that down you going to need higher the fan speed making the GPU more noisy..
Another AIO GPU with better cooling will keep the temps lower while also having less noise. Its this why you pay the extra tbh
Reference Design are really only good when using Crossfire or SLI..
Hot in who's opinion?
I think 70 degrees is pretty hot too. The card is designed to run like that so what's the problem?