Question LCD versus CRT monitor, LCD some tearing effects even with vsync on?

[rcgldr]

My primary monitor is a ViewSonic 1920 x 1440 CRT monitor, and recently I bought a Dell U2412M 1920 x 1200 LCD monitor as a backup, since the 1920 x 1200 monitor seem to be getting scarce these days (I want to be able to run at 1600 x 1200 4:3 aspect ratio).

I compared both monitors running at 1600 x 1200. On the Dell LCD monitor, even with vsync on, with a racing game (need for speed world), I've noticed what appears to be tearing like effects in scenery when serving side to side (game rendering issue?), and small vertical vibration when going over bumps (game may be doing this on purpose). The CRT monitor seems to mask these effects, even with vsync off. The CRT is running at 75 hz (it could run at 85 hz, but the game defaults to the lower setting). The LCD image looks clearer, sort of like comparing video to film.

My guess is that the CRT phophors transition smoothly between frames, which masks tearing and image jittering, sort a built in natural motion blur / blending effect. The LCD has an 8 ms grey to grey transition time, about double it's 60 hz "refresh" rate, so the transition time is much smaller compared to the CRT.

Getting back to my question, is the CRT just masking tearing / jitter effects being generated by the game, or does the LCD monitor have issues with quick horizontal motions and background scenery? I suspect the game is trying to emulate rough road surfaces with a bit of vertical jitter that the CRT monitor is masking out.

 

[geofelt]

A CRT works by constantly refreshing individual pixels.
When I had a crt, I found that I needed to run it at 85hz to keep from seeing a shimmering effect.

A lcd monitor works by keeping each pixel on unless it requires a change.
When I changed over, I noticed the better image.
In part because crt is analog, lcd is digital.

Tearing happens when the refresh rate is not the same as the frame generation rate.
Buffering techniques may make a difference.
Here is an interesting article on the subject:

https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-1080-and-1070-founders-edition-review/13

 

[rcgldr]

In my case, I think a particular game is having issues rendering scenery objects, so although vsync is on, there's still some minor tearing effects due to those objects not being rendered at the refresh rate. The CRT monitor is masking that effect, even with vsync off.

I'm not getting any shimmering effect, even when running at 75 hz. Part of this is related to the persistence of the phosphors being used on a CRT monitor.