I fiddled around more with CRU and created a custom resolution based on the extension block DisplayID.I'm not an expert on how to set the custom modes on a PC. But I believe there are a couple of people here that do.
There I could use higher refresh rates. When using LCD reduced timing I got a no signal message, but with LCD standard (which is still 400 lines less than default) it works.
I can now use 100Hz with Full RGB and HDR (8-bit with dithering), so that's an improvement!
100Hz has a pixel clock of around 906MHz and 120Hz is close to 1100MHz so that may be too much for full chroma.
Now to find out where the actual limit is in order to squeeze more out of it
I bought it at Alternate.nl, but it was in stock very briefly. I was very lucky. Club3D is a Dutch company, maybe that's why there were in stock here earlier.Where did you buy the cable? I know it's sold out atm. Just curious.