The default, open UE4 Editor, the video card will render the scene at full speed, on my machine, is 120FPS. The whole machine began to roar and the resources were too much occupied. In fact, there is absolutely no need for this, the frame rate of about 60 is enough.
How to modify it, try a lot of ways, the most effective is to modify the Baseengine.ini configuration file, modify the following line:
Smoothedframeraterange= (lowerbound= (type= "erangeboundtypes::inclusive", value=5), upperbound= (Type= " Erangeboundtypes::inclusive ", value=50))
Change the value of the last value to the value you want, I change to 50, restart the editor, the fan is finally quiet.
Finally, how to look at the frame rate, there are two ways:
One is to modify the editor preferences->show Frame rate and Memory, the advantage of this method is that it is global, after rebooting, the editor will remember.
One is to enter the stat FPS in the console command, which will display the current FPS on the game interface, which needs to be re-opened after the editor restarts.
Unreal Engine 4 reduces the frame rate of the editor