I recently bought a brand new UW34 Samsung monitor s34e790c (3,440 x 1,440) and connected it with my surface pro. I got a really nice and crispy wide resolution, but as soon as I play a video its runs surper slow. Video play includes youtube and locally stored videos. HOWEVER, as soon as I disconnect monitor, video started to play normally. Is there tweaking needs to be done to ensure smooth playback. I am connecting surface using mini-display port (1.2, which monitors als support) and running a full 3,440 x 1,440. Screen refresh rate is 60 hertz. Please help me get out of this bizarre issue. Thanks and finger crossed.