From the Dell internal Inspiron 5400 AIO training page =[IMAGE]
Hi, I used HDMI to connect to my Xiaomi 34" curved monitor. But there's no option for 3440x1440. The max resolution is 1920x1080. When I check my monitor, it is connected to Intel Iris Xe Graphics and not to the Nvidia  GeForce MX 330. Does it affect? Anyone can help my problem? Thanks.
Inspiron 5400 AIO, can't get 3440x1440 on Xiaomi 34" monitor