I would really appreciate a preference setting to lock my viewport at 30 or 60 FPS. If I launch UE4 and forget to limit the FPS in the console, my GTX 780 runs wild rendering the viewport as fast as it possibly can, in the hundreds of FPS, and eventually crashes the system. I do lots of gaming, and and CUDA rendering on this card, and it is rock solid. The Unreal editor is the only piece of software that I have ever seen crash this card, and the whole system.
Also, I need some GPU for the other apps I am running. It’s kind of crazy that their is no preference setting to lock the viewport FPS. This is something I have to type into the console every time I launch the editor.