I build my computer in 2014 with a Z87-Pro, GTX 780 and a Dell U2713HM and I've been using that until now. I just bought a new monitor, the Asus PA329C which is a 10-bit monitor and now use that as my primary monitor with the U2713HM as a secondary.
My issue is that I don't seem to get the 10-bit output on the PA329C. When I look at both Windows 10 Screen settings and the NVIDIA control panel it only shows 8-bit (without the option to select 10-bit).
I'm also curious about the refresh rate as I can only select 60 Hz even though it seems to me it should be able to output up to 76 Hz.
I've tried different cables, both 3 different HDMI cables (two older I had lying around and the one that came with the monitor) as well as one DP cable. I've also tried swapping the GPU to an RTX 2060 I had in another machine but so far nothing has worked.
What am I missing and how do I use the full potential of my monitor?