I've just bought a 144hz Acer Predator Z321QU monitor and I'm noticing some really horrible effects in movies and videos (but not in games) and I don't know how to define it. Objects moving quickly look like they are vibrating or shaking, and camera panning looks rough and choppy. I do also get after-images of my mouse pointer when moving it quickly.
I get this in Youtube videos as well as movies, but seemingly not in games.
I've tried the UFO tests and while the monitor does seem to have minor ghosting the motion itself is still smooth, not like the videos. The UFO test looks more like a faint smear while the videos look like duplicated images. I've also tried various Overdrive settings and there's no discernable difference whether it's on or off, though the Extreme setting actually seems to make it worse.
I don't have alot of experience with monitors so I can't identify "ghosting" or motion blur when I see it. Here is a video and some screenshots I took with my phone as an example - watch the spaceships as they go by, it's like they're flashing and in 3 places at once (watch in slow motion to see it better):
As you can see in the video and screenshots there are after-images and even sometimes 'before-images' as well. Is this ghosting? Motion Blur? Or just poor quality videos?
I've never noticed it in games, which are perfectly smooth to my eye. It's only apparent if I take a photo while quickly spinning the screen, but in that situation I'm not sure it's the same issue.