Okay. I’m back to this issue. When having a look at this other forum post below, it looks like the video card displayed is just the first video card on the system, and is not necessarily used for rendering at all? The GPU Affinity Override seems to be the must have setting here, to exclude the intel card, with slot 0 disabled.
https://forums.thinkboxsoftware.com/t/slave-info-videocard-selection/24109