4k monitor XB280HK PS4 pro



You have the name of the monitor, it only has one port, is it that hard to find what kind of port it is?

https://www.acer.com/ac/en/NZ/content/model/UM.PB0SA.002
rU2otk2.png

G-Sync monitors are intended for PCs. You need to use DisplayPort which is only found on PCs. HDMI to DisplayPort adapters will be limited to 4K 30 Hz.

https://www.amazon.com/gofanco-DisplayPort-Converter-Compliant-Dual-Mode/dp/B01BXMOREI/