Flickering with g-sync

High Hz on OLED produce excellent strobeless motion blur reduction with fast GtG pixel response. It is easier to tell apart 60Hz vs 120Hz vs 240Hz on OLED than LCD, and more visible to mainstream. Includes WOLED and QD-OLED displays.
Drabat
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Flickering with g-sync

Post by Drabat » 15 Sep 2024, 18:04

Hi ,

I just buy my first oled moniror (AW2725DF) but i got a an heavy vrr flicker sometime on game , it goes away when i disable gsync , i read i can negate that with a custom resolution ( 2560x1440@350hz) i want to try that but i cannot create it on nvidia ( option grey out) and i cannot too on CRU.
I can change the resolution on my second monitor, but i don't know if g-sync is usefull with oled @360hz

Can someone explain me how can i do that ?

Thanks for the help

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Re: Flickering with g-sync

Post by RealNC » 15 Sep 2024, 19:25

You can't get rid of flicker on OLED. You can use RTSS or NVCP FPS cap to stabilize the framerate and reduce FPS fluctuations. But you can not get rid of flicker during frame time spikes.

Guides that claim you can get rid of VRR flicker on OLED by custom timings and refresh rates are simply wrong. What these tweaks do is simply make g-sync not work anymore, which is why the flicker is gone. You might as well just disable g-sync, same thing.
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Re: Flickering with g-sync

Post by Drabat » 16 Sep 2024, 09:37

Thanks for the answer but yes i know the flickering is a thing but it's strange that it appears only with gsync i was wandering about disabled it but doesn't it help with fluidity and latence ?
Sorry if the question is dumb but i read a lot of thing about gsync but nobody said the same
Thanks

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Re: Flickering with g-sync

Post by RealNC » 16 Sep 2024, 10:49

Drabat wrote:
16 Sep 2024, 09:37
Thanks for the answer but yes i know the flickering is a thing but it's strange that it appears only with gsync i was wandering about disabled it but doesn't it help with fluidity and latence ?
Sorry if the question is dumb but i read a lot of thing about gsync but nobody said the same
Thanks
It only happens with g-sync (or freesync) because this changes the refresh rate of the display. Without g-sync, refresh rate is fixed, and so dark color brightness remains fixed as well.

If you want to understand it better, simply run a game with g-sync enabled that can reach like 300FPS somewhere and apply two FPS limits. A 300FPS limit in the nvidia control panel, and a 90FPS limit in RTSS. Have a hotkey in RTSS that can toggle the FPS limit on and off. Now run the game and use the hotkey to toggle the RTSS limiter on and off. As you jump from 90Hz to 300Hz and back, you will see the brightness of dark colors change. The lower the refresh rate, the brighter it gets. This is what causes the flicker. When a game has bad frame times and you get frame time spikes, this directly translates to brightness spikes, which is flicker. And it's not fixable. Any "fix" people claim is working just means the monitor is prevented from actually lowering its refresh rate, which in turn means it makes g-sync not work correctly.

If you disable g-sync, the monitor is running at 360Hz all the time, regardless of the FPS the game is running at. No flicker.

So the best way to reduce VRR flicker on OLED is to try and stabilize your FPS as much as possible using an accurate FPS limiter. RTSS is good at this, and so is the Nvidia control panel limiter ("max frame rate" setting.) I cap to a frame rate the game can reach most of the time.

However, at 360Hz, g-sync is actually less important compared to a 144Hz display. I'm on a 240Hz display here and sometimes I have a hard time seeing any judder in games even without g-sync. I would imagine it's even better at 360Hz. So if disabling g-sync still looks perfectly fine to you, then simply don't use g-sync :)
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Re: Flickering with g-sync

Post by Drabat » 16 Sep 2024, 15:25

Thanks for the explanation so for my case gsync is not usefull right it doesn't impact the latency , it's juste to get VRR im right ?
It can explain why i have flicker lol , 360fps with my 2080ti i can only hope to get that

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Re: Flickering with g-sync

Post by RealNC » 16 Sep 2024, 17:42

Drabat wrote:
16 Sep 2024, 15:25
Thanks for the explanation so for my case gsync is not usefull right it doesn't impact the latency , it's juste to get VRR im right ?
Yeah. G-sync is VRR. Nvidia calls it g-sync, AMD calls it freesync.
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Re: Flickering with g-sync

Post by Drabat » 16 Sep 2024, 18:17

Ok i'll will try without gsync but on triple A game i don't have 360 fps and random drop so i will see how it goes

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Re: Flickering with g-sync

Post by Drabat » 17 Sep 2024, 09:32

Well i played some elden ring and the image doesn't feel right without gsync im at 60 fps all time , but i also disable vsync should i keep it enable ?
Thanks

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Re: Flickering with g-sync

Post by RealNC » 17 Sep 2024, 15:32

Drabat wrote:
17 Sep 2024, 09:32
Well i played some elden ring and the image doesn't feel right without gsync im at 60 fps all time , but i also disable vsync should i keep it enable ?
Obviously. Without v-sync, there's tearing.

For Elden Ring I recommend you try LosslessScaling frame generation though :P
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Re: Flickering with g-sync

Post by Drabat » 17 Sep 2024, 16:24

I don't know this software can you explain me what it does ?

I will try with gsync disabled but vsync enable lol
Thanks

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