I have recently Bought a 28 inch samsung 4k monitor and hooked it up to a GTX 770 via hdmi cable. The only problem Im getting is when I set windows to 4k resolution which is recommended and then when I go into nvidia control panel the resolution is set at only 30 Hz and cant go higher but the monitor is capable of producing 60 Hz. When I change the resolution to 1080p I do get the option to change to 60 Hz. Is this because my gtx 770 isn't powerful enough to support 4k at 60 Hz therefore I will need to purchase a card like the GTX 1070 0r 1080 to get the resolution set at 4k @ 60 Hz??