Hello,
I’m experiencing the same problem here.
Got my new laptop: i7-6700, GeForce GTX 970M, 16go ram. And whenever I mouse over an icon and the tooltip appears, the framerate drops dramatically. UE4.14, empty project : 60fps to 30.
And my graphic drivers are up to date.
Any help would be nice. I bought that laptop exclusively to work during my “vacations” So that would be very depressing to have such drops.