Have you installed the ICC profile for your monitor disi ? This is something I had to do with my LG displays. Though I do not have a 144hz monitor... Maybe try adding the ICC profile from your monitor's website. This is sort of a task in and of itself that not a lot of people do - generally, they just toss that disc that came with the monitor aside and call it good. Plug and play, right? Windows 10 updates have been ill managed when it comes to fetching these color profiles from updates.
mudkips, that desired resolution and refresh rate are supported by HDMI 2.0 standard, have you tried an HDMI cable instead? - HDMI would not support the 10 bit depth, however. Related to this recommendation, I've looked all over the AOC website regarding your monitor and cannot find where it supports 10 bit color. I'm only seeing where it supports 16.7 million colors, and that's not 10 bit. Monitor nerds website says otherwise, but the official website does not indicate this. Are you able to get 10 bpp at lower refresh rates or what? And another thing, just in general, from my experience, you might have to jump through a hoop or two to enable Freesync on some displays, even the ones that have it on out of the box - is Radeon telling you that it's on. Or are you telling windows to go to a specific refresh rate in the adapter option?
I have two different 10 bit monitors myself, and they're not true 10 bit panels, they're 8bit+2bit FRC or A-FRC. Radeon Settings didn't see 10 bit color until I installed those color profiles from the manufacturer's website. At this time, Radeon settings is showing me all the correct specs and color settings for the monitors - what it does not show me is the freesync range as conveyed by the manufactures when it comes to available display modes via the adapter options. This is just something I'll have to look up for gameplay + radeon chill or target frame rate control. So, a note about one of my monitors, the LG 27uk600 - it supports HDR/WCG, and it looks amazing when viewing HDR content - but the picture adjustments are locked down like you wouldn't believe because that monitor only has a 1.2DP in the back. I found that getting the 10 bit working and setting my color preferences close to REC709 color was much more visually beneficial than the HDR setting on that monitor.
So I'm getting 4k60 10 bit with and without HDR/WCG frills and that link speed is still saying 5.4 Gb/s - because that's only as much as it needs for that signal. So, disi, do you have a 5k+ 10 bit display to plug in? - that would overwhelm the link speed need. The link speed is only ever going to be 5.4 per lane until you need the HBR3 speed. It's an energy saving / error reduction methodology at work here.
I mean, there could be a workaround for the physical hardware, some monitors have super-resolution where you can send a higher resolution that supported and it will down scale it. This could test the link speed for HBR3 availability.
