Two exact same G Sync monitors but one has "brightness flicker"

rn2 · 3 Oct 2019 at 22:51

I just bought a monitor which is exactly the same as the one I already have. Checking device manager, both of the monitors have the same drivers. Both monitors OSD settings are exactly the same too but in a certain game one monitor flickers (like that loading/menu flicker you get with gsync but its in the game also).

I can't figure out why..

rn2 · 4 Oct 2019 at 05:22

I seem to have reduced the flicker (more like to how the other monitor is. I turned the screen refresh rate down from 144hz to 100hz in Nvidia control panel. I don't game above 100 fps anyway luckily. It might be worth leaving this here to possibly help some others.

It was more of a brightness blinking which you get in a lot of Gsyncs when loading games or in certain desktop applications.

I guess it's a power issue.

P.S. What was weird though was that after changing the monitors refresh rate in the Nvidia control panel I started up one game and I still had to change the refresh rate again in the game for it to take effect. I assumed Nvidia overrid that.

Rroff · 4 Oct 2019 at 06:11

Are you using 2x G-Sync monitors side by side from the same system at the same time?

rn2 · 4 Oct 2019 at 06:59

Rroff said:
Are you using 2x G-Sync monitors side by side from the same system at the same time?

No. one is an old one that I cracked and I got it back out to compare. Exact same model but even a different OSD. I bought the one I was having issues with the flickering second hand, it also has a couple of less options in the OSD.

It's second hand so I can't return but it's okay like I said I never gamed over 90 frames on my other monitor.

rn2 · 31 Jan 2020 at 03:49

Sorry for replying to this old thread but I just wanted to say that I finally got to the bottom of the issue. All it was was a simple setting in the Nvidia control panel.

I Changed the G-Sync setting "windowed mode and full screen mode" to "full screen mode". I am not sure why the former setting has such a bad impact on the monitor.

varkanoid · 31 Jan 2020 at 12:43

rn2 said:
I just bought a monitor which is exactly the same as the one I already have. Checking device manager, both of the monitors have the same drivers. Both monitors OSD settings are exactly the same too but in a certain game one monitor flickers (like that loading/menu flicker you get with gsync but its in the game also).

I can't figure out why..

Welcome to the monitor lottery. You did not mention which monitor?

Check firmware versions in the settings and model numbers on both to see if they match on the label. Possibly a dodgy cable.