Predator 27" XB3 - DP max resolution is 1080P (cannot switch higher)

Nukes · June 2020

Hi All - Sorry if this has been answered already. Tried to do a search but couldn't find anything exactly like my problem. Purchased a brand new XB3 today. Connected it to my GTX1070 using DP but for whatever reason I can not change the resolution higher than 1080P. I do have the option to enable Gsync. Decided to try out HDMI instead and found that I have the option to select any resolution up to 4k (including my preferred 2560x1440) HOWEVER I can no longer enable G-sync. After reading the forums, it sounds like DP is required for G-sync. How come I cannot select a higher resolution using DP? What am I doing wrong? Note that I am using the cables provided by Acer in the box. Any help would be appreciated. Thanks!

Specs:
27" XB3
Nvidia GTX 1070
Window 10 64bit

Nukes · June 2020

I believe I figured out my problem. It seems that I purchased the Predator XB273GX which according to the Acer specs sheet has a maximum resolution of HD (1920 x 1080) 240 Hz. I believe this explains why when I use DP, the maximum resolution is 1080P.

I still can't understand why HDMI allows me to hit the higher resolutions without G-sync but at least I seem to understand the limitation.