Is it ok to keep fanspeed at 100% in OC settings always ?

So in all of my OC settings I have kept the fan speed at 100% , and this not only keeps the fans on my GPU at full speed , but also of the case fans I have kept on either side of my GPU at full speed as it is also connected to the afterburner settings through a fan controller hub

My temps are always very low like 50 -52 as a result of this But they are hashing at full speed

So is it ok to do this ?