The T3 has a problem with its video out, its not outputting correctly on the HDMI, lots of signal noise and drop off when in use, that's a pity.. I had a similar issue with my Odroid C2, though I didn't try it on an LCD, this at least does work perfectly on the 7'screen hardwired with a ribbon, albeit in 800x400. The cable is a little delicate though I need to get a stand to fit them in once place before the ribbon gets ripped.
That's such a shame, as I really wanted this to be a full screen machine. Oh well, I'll use it on the small screen at my desk, where it does indeed look very snazzy, once I get it hooked up to the interwebs, I'll see if I can find a nice appointment planning display to run when not testing games.
The T2, works wonderfully though, there's really no noticeable difference between them other than cores, and slightly different versions of Debian (noticeable in the wifi setups) both feature eMMC memory for really fast boot and file handling (network access does cause a pause though)
the T3 should be a lot faster of course and it certainly feels like it is fast and smooth, but we are working on half the screen size. So its not a great indicator.
Disappointed as I am by the lack of HDMI, it does have its own screen, so I can use it quite comfortably as a test device for multi core programming. So happy days Sat at my desk under the main monitor.
The T2 works fine on the HDMI,. not at full res though, which seems to be a common theme with Nano Pi machines, its 720p rather than 1080p but for now it is ok, I could rebuild the kernel or some other Linux wizardry, but that breaks the brief of not learning any in-depth Linux.
For now my main issue is getting them to connect to the uni network..so I can update them and download a few test aps.
They are 1G versions, with 8G eMMC memory