Colour depth 4k monitor

[orangepop]

I snagged up this Acer ET32QK monitor the other day and it finally arrived tonight.

I've been messing around in the Nvidia control panel attempting to get her to 4K, 60Hz at 10bpc, and keep falling flat on my face...

 

Originally, the stock DP cable it came with was having issues with the HDR setting on the monitor, and don't believe I managed to get a 10Bit signal at all with it.

Assuming it was a bandwidth issue I decided to give one of my HDMI cables a go, and it worked! However there seems to be a few quirks, and I can't wrap my head around it.

 

A) The color depth for YcBcR422 runs 4k at 60Hz at either, 8,10, or 12 bpc, but RGB appears to run at only either 8 or 12 bpc (at 30Hz....need a new cable I guess...)

-Why dose the selection permit me to select either 12bit or 8bit, but not 10bit? Is this not an option? Am I missing something? Is not 12bit greater than 10bit?

 

B) Would anyone be familiar to why the HDR profile on this monitor is greyed out while using DP at all? Seems rather odd...