RemoteFX: Using a Dell Server -- Is it even possible?

I have a Dell T420 PowerEdge.

It has an onboard video card and Dell says I cannot disable it in the BIOS... If that is the case, and if RemoteFX requires that all video cards be identical, how can Dell Servers ever be compatible with RemoteFX?

What I end up having is -- The Card shows up (sometimes) under Hyper-V Settings, but I cannot assign it to a VM. Then other times it is not there and if I enable / disable the new GPU it works again.

I mean the card always works.. I just mean Hyper-V is randomly "losing" it.. and I am guessing it has to do with them not matching.

I know of literally zero companies that sell servers that come with awesome video cards, so how do any of these Server products ever get used with RemoteFX?

Thanks