Low fps in editor and empty map

Machine :

  • GeForce 1060 6GB
  • I7 7700K
  • 32 GB Ram

Empty level, clean project, editor reports 40-50FPS
Obviously, previous UE versions used to run empty scene at 120-150 fps on this machine.
I did some research and tryied :

  • Turning off Gsync
  • Turning off GeForce Expercience overlay
  • Killing all background process
  • Setting Windows power setting to high performance

Other apps like Unity are running fine. Framerate issue only with UE4 editor.