So... hardware multiboxing?

[nodoze]

No, nvidia doesnt support more than 4.

4 off the rtx 3080. The quad multiplexer is all hdmi, so I have a couple hdmi to DP adapters to make it work. So 1 is straight hdmi, the other 3 are hdmi to DP adapters, and the 5th runs off the igpu via HDMI.

Ah cool that you got it working with 2 video cards. I thought I read somewhere that after extensions the max was 8 monitors for some video cards.

Note that there is a lot of bandwidth in a single 1.2+ DisplayPort that can be "carved up" into multiple monitors. I think via Multi-Stream Transport (MST) a single DisplayPort can be extended to 4 1080p displays:

https://images-na.ssl-images-amazon....AC_SL1500_.jpg

The following is a decent depiction of how it could look from a single DisplayPort to multiple physical monitors with multiple cables:

https://www.dell.com/support/kbdoc/e...-transport-mst

Something like this may allow a single DisplayPort to be 4 displays to then be fed to a quad multiplexer to a single physical monitor:

https://smile.amazon.com/dp/B083NQSHHD

Not 100% sure that Aster can assign MST monitors to separate desktops but if it can then multiboxers may get more out of a single video card that way.