So i just bought a new TV and it should be able to display 4k 60hz, but the max im getting on windows 10 is 30hz. ive already tried having it as my only display instead of duplicating, and still cant get it at 4k 60hz. if i put it at 60hz, the resolution drops to 480p. i can get 60hz at 1080p, but as soon as set the resolution to anything above 1080p im limited to 30hz. Could it be my HDMI cable?