I've been able to select this resolution before with no issues in the past, now using AMD's VSR I can only select 3840x1620 which is to high for my GPU. I'm not sure what caused this but I can not even make a custom resolution as such as it will tell me it can not support it.
Ryzen 5 1600@3.6
Vega 64@Stock
16G RAM@3200
29wk500-P 2560x1080@75 Native
Ryzen 5 1600@3.6
Vega 64@Stock
16G RAM@3200
29wk500-P 2560x1080@75 Native