those are perfectly acceptable.
hell, i wished my 570 ran that cool. the twin frozr edition cards are known for their low temps, as the ones you posted are nice and frosty. a reference card temps are more around the 70-80c range. no need for worry here, go play some SWTOR!
You're totally fine as stated above. Temperatures 70C-80C are even still fine, but not decent. GPUs Overheat at 90C or more. If you are willing to see how your temperatures is at full load, you can try downloading Furmark or MSI Kombustor so you are sure if you can play more demanding games or not.