My latest HDMI and control driver enabled to handle 1080i (interlaced scan) for some devices not possible to bandwidth of 1080p. Latest windows client ( you can download here ) supports this with latest firmware system version 2016.06.09 or later.
Actually I don’t recommend to use 1080i, but it’s up to you. My opinion is set resolution as 720p instead 1080i in gaming for enjoying 60fps in realtime because 1080i or 1080p had blocked to 30fps limit by CPU performance problem.