[p750mmx]

p750mmx: In your DP->HDMI adapter setup, waht do you see in windows "Display resolutions" ? Do you see "3D" only for the 1920x1080 resolution (maybe also 720 resolution), or also for all resolutions ?

Also, please excuse the question: Are you sure you where looking at FullDH 3D / frame-packed mode ? Maybe it was just half-sbs displayed by kodi and your TV automatically switched to 3D display ? (sorry for asking, i am desperate ;-) 

I see the 3D remark only for the 1080p/720p resolutions.

Kodi says "Hardware based" when playing a MVC video? When starting a video and when going to 3D info during playing.  

I have the exact same CPU with the DH270 and got „Hardware based“ 3D to work.
But in PowerDVD 17,18 and 19 it‘s kind of a weird 3D effect.
Can you maybe test that with your 1080p 3D TV?
Within kodi it‘s fine, but i would sometimes like to watch the extras.  

I tested this with the system that you can see in my previous reaction and on a 1080p 3D passive monitor, not TV, although that should not make a great difference.
I used the "latest" V19 for that, and the 3D test-files I use seems to be playing just fine? I set, just to be sure, 3D settings to manual (HDMI 1.4 1080p/24Hz), but on auto I see no difference in output. Monitor switches to 3D and all goes well it seems.

I didn't test it with the DH270 because that is connected to my TV and that one isn't 1080p but 4k. I use the Interlaced 3D setting on that, and for me, that is just great in 3D.
I will test with PowerDVD on that system on another moment, can't say when this will be, but as I understand you use a 1080p 3D TV, correct? So maybe that test doesn't matter at all?