the XTX is a great card, I have one myself.
My only problem was the fan would not kick up to the high RPM it needed. I had to download the ATI overclocking tool to override it and keep the fan running at 100% speed.
You should be okay in your specs. If it starts to get insanely hot and you start getting artifacts try to force the GPU fan to 100% and it should be floating around 49-51 degrees C