Ran the same test and measured 17ms of input lag compared to my Achieva Shimian. It's not lag free, but it's not as bad as you seem to be experiencing. To my eye it's practically unnoticeable.
I've also used both the DisplayPort and HDMI 2.0 inputs (as well as the HDMI 1.4 input for my PS4) on this display and have experienced no issues with input lag. My previous monitor was an Achieva Shimian 1440p IPS panel. Input lag basically "feels" the same between this display and the Shimian.
I've not experienced input lag anywhere near as bad as what you mention above. I have noticed some slight ghosting when dragging light text around a black background on the desktop or something, but my ability to play games, including Overwatch, has been unaffected. If there is any input lag...
I concur with LanPirate1, this monitor upscales quite nicely. Games will look a bit blurrier if you're upscaling 1080p to 2160p but it's still completely viable on this screen. I played through a good chunk of Uncharted 4 (at 1080p) on this screen after hooking my Playstation 4 up to one of...
I received my UHD400 last night and first impressions are quite positive. I do have a couple odd issues though and am curious if any of you have experienced anything similar:
It seems like most notches on the "brightness" setting in the OSD menu look exactly the same? Brightness levels 18 -...