That temp is ok, graphic cards heat up, no need to worry, if it goes beyond 80-85C then its something you have to fix, I think the 560 heats less than the temps you are reaching tough.
What case do you have, is it ventilated properly?
My laptop with the ati 5 series , I have stressed it to 210 degree Fahrenheit, yes you read it correct 210, the temp at which water boils. It reaches that by just playing TF2 when placed on a table. After that I just elevated the laptop legs using bottle caps and it runs much much cooler (79-85 Degree Celsius)