Fix:
Do not use “Use Fixed Frame Rate” in the engine general settings as this will limit your frames but not limit your overall FPS (This will actually remove any limit you set in place)
On Event Begin play console command t.maxfps 30
Or in your Editors
C:\Program Files\Epic Games\4.9\Engine\Config\ConsoleVariables add
[Startup]
t.MaxFPS=30
Worked for me.