I recently bought a 4k tv (TCL U50E5800FS) and I am having trouble getting it to run 60hz while at 3840x2160. I am using a Gtx 980 with the 362 driver installed, outputting from HDMI 2.0. I'm using a brand new HDMI 2.0 cable and the TV has 4x HDMI 2.0 inputs, all of which i have tried. I've...