How to stop "textures flickering" in UE4?

I’m using a gtx 770 and a 4770k on windows 8.1. I never had this problem on 4.2. Upon loading a standard project in the editor shadows and lights flicker both in the editor and during runtime. Although more severely in the editor. I’ve included a video of the problem.

Hi unphasable -

What is the Nvidia Driver version that you are using?

Thank You

Eric Ketchum

GeForce 340.43 Driver

turns out 340.43 was a beta driver. Rolled back to 337.88 and all is good.

appreciate you pointing me in the right direction Eric.