AIO fake Desktops no GPU slot or card to change, no x16 slot like on real desktops.
are you asking for canvas mode or mirror mode. IDK usage , so.....
i just RTM your manual there is no rear GPU port there at ALL so no MONITOR POSSIBLE> at all.
so buy a real desktop, MT sized and put any GPU card there, with DP ports. (or card with many ports , ask)
or any PC with DP display port and daisy chain 2 x DP monitors.
DP 1.2 up version and MST mode
- Compatible video or graphics card (GPU) with DisplayPort 1.2 port (or newer version)
- DisplayPort 1.2 MST-capable monitor (both)
- Latest video or graphics card (GPU) drivers that in fact support MST. 12 makers of cards exist for REAL PC's;
there are 2 choices, buy real PC or one with DP 1.2 MST certified already.
NO warranty answers by me.