so I had some time today to check for the input lag at last
the good news: you can totally play games on this set!
I measured the input lag at about 40 to 50 ms
in game mode with input set to PC.
(The comparison notebook was a Dell XPS, so you will have to add a few ms compared to the Leo Bodner test method.)
I took three or more pictures for every mode I tested and calculated the average:
- Standard / TruMotion Clear = 122 ms
- Standard / TruMotion Off = 65 ms
- Game / PC Input / Standard = 67 ms
- Game / PC Input / Game = 50 ms
As a comparison, I measured the input lag of the Sony W905A with the same method at 16 ms, which is quoted with 20 ms (Leo Bodnar) at the HDTVtest input lag database
The notebook had 720p as output resolution. When I hooked up my gaming pc and fed the TV with WQHD (2560x1440), I got very mixed results ranging from 16 ms to 67 ms. After 14 measurements I got an average of 41,5 ms
I then used the TV as the only monitor with 4K resolution (4096x2160) from a GTX 980 with HDMI 2.0 and 60 frames, which worked pretty well for playing 4K videos (the TV also supports them directly when plugging in an external storage device, but not all formats). Some games had problems with this high resolution and displayed only the upper left part of the screen, but this is the game's fault I think.
When I switched down to 1080p, the games ran as they should - smoothly and without a lag that bothered me. The Talos Principle (screenshot 2) looked amazing, as did GTA 5 on the PS4 - I had no problem driving around in traffic, which is my personal indicator of too much lag
And best of all, no visible banding / DSE in the sky like my Sony, hurray!