The processor you are using can safely operate at temperatures up to 74 degrees but obviously, lower is better. It is not a good idea to run your fans that fast though as it will decrease their life expectancy. It is OK to put them on full every now and again when you CPU is getting a little hot, but it's not recommended for constant use.
Answered by, JoshWS
Ok i will only increase the speed whenever it is required only then. thanx for replying