Hi all, Just purchased a Dell P2715Q 4k monitor. Looks great, but I've noticed that it lags a lot when I put an application in full screen, specially scrolling but also typing. If I shrink the canvas of that window that it's smooth and I don't have any problem. I'd guess it's something to do with the painting of the pixels from OSX. Does anyone else have this problem? I'm running a Mid 2014 Macbook pro retina 15" with i7 with 16gb ram.