The fan will run fine within it's allowable RPM-range of operation, unless you find your particular fan to be too noisy at a given speed...
Are the temps you are reporting at idle? (if so, I'd leave the fan at higher RPM so that temps are not too high under a medium-heavy load...)
YOu may subject your cpu to a medium heavy load approximating that of even the heaviest gaming scenario merely by downloading/installing /running Intel's Extreme Tuning Utility/CPU test, which should have it running at ~63-67C within 2 minutes or so...
https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU-