I wasted too much time on this - so I thought I'd quickly write in this if someone ever googles the same question 😎
- Monitor - Samsung 28 inch 4K UHD Monitor (UE590)
- Graphics card - NVIDIA GeForce GTX 1060 6GB
In the end, I had two issues why the 60Hz at 3840x2160
- You need to create a custom display mode through 'Nvidia Control Panel.' I found this annoying first up because in Windows 10, if you type "Nvidia" into the search, only ''GeForce Experience'' shows up. You can find it at --> Control Panel\Appearance and Personalisation. Then find "Change Resolution" - Customise - Create Custom Resolution.
- The second issue I had was that my HDMI cable couldn't handle 60Hz on 4k. I actually used the cable that came with the monitor, which you would think is 60Hz 4K capable - s maybe it was actually my graphics card's HDMI port that is still an older version. The solution for me was to use a Display Port cable.
And that worked perfectly for me. It took a lot of hassle to finally reach this solution though! 😵
If this post helps save someone out there a few hours I''ll be glad. 😁
“True knowledge is not attained by thinking. It is what you are; it is what you become.” ― Sri Aurobindo