I'm the one that want 4K monitor to runs 1080p HIDPI mode. but now no monitor can't satisfied me? e.g.. 30Hx, expansive, no IPS So I just setting my mac pro 2009 w GTX680 flash and Dell U2711. To run 1080p HIDPI Mode for this thing i feel it like i'm using 4k HIDPI. This just work. You guys without 4k monitor can do it.