zotac CI549 nano does 4k60 over thunderbolt and not HDMI



 The CI549 nano from Zotac is a fanless mini-PC from Zotac.

It can do 4k60 out its Thunderbolt 3 port at the back.  Specifically, it works fine at 2160p at 60 Hz driving this Eizo EV2785, using the thick thunderbolt cable supplied with the monitor, connecting the USB-C-shaped port on the Zotac marked "TBT" to the USB-C-shaped port on the monitor labelled "SS".  Running Debian 10.

I've also used full 4k (4096x2160) at 60 Hz from the same TBT port via a thunderbolt-displayport adapter to drive a CG3146.

It's especially useful to know to use TBT / Displayport on the CI549, because 4k out its HDMI port doesn't work.

Some other brief notes on tyhe CI549: it accepts up to 64G RAM in practice, even tho they advertise it as 32G.  This is a lot for a tiny machine.  The power brick and cable are a pain, like on everything except the mac mini.  These things are never included in the marketing photos, but the power brick and thick mains cable together have more bulk than the main unit.  It runs rather hot -- is this why it was withdrawn, despite apparently no other fanless Zotac nano exceeding its specs in the intervening 4 years?  Or are we just on the decline?  I'd like to try a 10gbe network adapter on the thunderbolt port.  This could turn it into a nice fileserver.  It beeps on boot, and to stop this I had to disassemble it and physically remove the beeper (piezo buzzer).

I can't remember exactly what proprietary firmware it requires, but Zotacs are fairly bad and inconsistent on this.  The power input is sadly incompatible with other Zotacs, even though the physical connector is the same.  It does not arrive marked for the CI549, so you have to label it yourself, especially if owning a mixture of Zotacs.

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