I have this in glass on the side of my case to see what my computer is doing. JayzTwoCents has a tutorial on how to make your own, but treats the screen you're using as a full monitor. This can be weird, so this is a nice easy fix for those who don't want to go down that route. Software. Well, that's the weakest part of everything. You can get lost trying to create your own screen configuration. I'm using one of the templates that came with it. In my case it was glued to the PSU case with double sided tape. I then routed a VERY thin USB-C cable through the hole in the case fan bracket and into the motherboard. No drilling or modifications. (If I had to do it all over again I would add an internal USB port via a PCIE 1x card and hook it up to a cable, I can still do it.)
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