OS X El Capitan Scaled Resolution Performance?

[fruitninja]

This might be a funny question to you, but which is the absolute lowest resolution El Capitan (the OS) supports? The reason I'm asking is, I might want to administer a headless Mac Mini via a jumbo phone or a smallish tablet.

 

[Cardsnk]

I followed these instructions: https://forums.macrumors.com/threads/scale-1680x1050-on-rmb-without-an-app.1873910/

Is there any way to make this HiDPI in switchresx? thanks

Edit: Figured it out.