Everyone has different views on graphics card temperatures, AMD cards are rated to about 90c maximum temperature safe, but really, most people would be concerned at anything over 70, my self personally, 80c is my limit, my custom fan profile allows my cards to hit about 75 with about 50% fan speed, anything over that on a climb towards 80c, its 100% fan speed get it cold not bothered about the noise it kicks out. but on its way to 75c which is rare unless its a graphics heavy game it wont reach that. but as you said hot to the touch, well yes, if you had 300w of electric running through your arm id guess it would get warm pretty quick?

its normal. infact my old 4970x2 had about 4 heat warning stickers on it that was glued on proper not just stick on things, they was laminated and would not come off, and that ran at about 90c on stock cooling both cores (dual GPU card) and it lasted fine for years.