Predator XB1 XB321HK No 10-Bit Color Support?

Zatara

I recently purchased a 4K Predator XB1 XB321HK Monitor, but I'm unable to select 10-bit color support (stuck at 8-bit).  I've tried three different DisplayPort cables (including the cable packaged with the monitor).  I can confirm my video card, a GTX 1080, supports 10-bit color, having successfully tested it on two different DisplayPort monitors (HP Z27X and LG UltraWide) and an HDMI 2.0 TV (Samsung KS8000).

 

The XB321HK is explicitly advertised as supporting 1.07 billion (e.g. 10 bit) colors here: http://www.acer.com/ac/en/GB/content/predator-model/UM.JX1EE.001

 

Can anyone confirm that XB321HK actually supports 1.07 billion colors, as advertised?  Or is this actually an 8-bit panel (offering only 16.7 million colors).

xb321user

panel = AU Optronics         

 

"This part also has a native 10-bit color depth along with an sRGB color gamut"

 

i to have the same problem as you 8bpc selection only, not sure whats going on, drivers on nvidia's end maybe?