Vsync + Frame cap similar to G-sync?

Talk about NVIDIA G-SYNC, a variable refresh rate (VRR) technology. G-SYNC eliminates stutters, tearing, and reduces input lag. List of G-SYNC Monitors.
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dtanner
Posts: 2
Joined: 16 Sep 2020, 12:58

Vsync + Frame cap similar to G-sync?

Post by dtanner » 16 Sep 2020, 13:11

Hi folks,

Pardon my ignorance on this subject but I recently upgraded from a 7 year old 120hz monitor to the Samsung Odyssey G7. My eyes were bleeding at the improvement in all aspects but when I turned on G-Sync I had some crazy flickering issues and this seems to be a common problem with G7 owners and there doesn't seem to be a viable firmware/software fix for it.

I *really* don't want to return this monitor because G-sync doesn't work as I love every other part of it (including the monster curve). I average around 150-200+ fps in some of the games I play. I was told that if I turn adaptive sync off and let it run at 240 hz and use Rivatuner or the in-game cap to cap my FPS at 239 FPS, I won't need G-sync.

I wanted to consult the experts here as the knowledge here seems light years ahead of Reddit on these issues — is this true? What am I missing out by doing this? And if I had to return it, is there any equivalent monitor you could recommend that ticks all the boxes and has an actual G-sync module instead of just being G-sync compatible?

Maybe it' s my old eyes but I can't seem to tell the difference with G-sync on (aside from the flickering) in the Nvidia pendulum demo if I follow the above setup. I can tell the difference in smoothness in my G7 240hz compared to my friend's 144hz monitor. I can't help shake the feeling that paying 700-800 dollars for a monitor, you should be able to use one of it's prime features i.e. G-sync.

Thanks.

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jorimt
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Joined: 04 Nov 2016, 10:44

Re: Vsync + Frame cap similar to G-sync?

Post by jorimt » 16 Sep 2020, 14:01

dtanner wrote:
16 Sep 2020, 13:11
I *really* don't want to return this monitor because G-sync doesn't work as I love every other part of it (including the monster curve). I average around 150-200+ fps in some of the games I play. I was told that if I turn adaptive sync off and let it run at 240 hz and use Rivatuner or the in-game cap to cap my FPS at 239 FPS, I won't need G-sync.
See:
https://blurbusters.com/gsync/gsync101- ... ettings/7/

To sum-up, with variable 150-200+ FPS within the refresh rate and standalone double buffer V-SYNC enabled, frames will repeat periodically, causing a recurring stutter and a 1 to 2 frame increase in input lag over G-SYNC or no sync at any given time.

That said, any scenario is relatively low lag at 240Hz, and the appearance of tearing is also reduced that that refresh rate, so if G-SYNC isn't working properly on your particular monitor model, your system can't maintain a constant 240 FPS in the games you play, and you don't want to deal with the downsides of standalone V-SYNC, you'll have to try no sync (G-SYNC off, V-SYNC off), and see if you can tolerate the tearing artifacts.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Display: Acer Predator XB271HU OS: Windows 10 Pro MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

dtanner
Posts: 2
Joined: 16 Sep 2020, 12:58

Re: Vsync + Frame cap similar to G-sync?

Post by dtanner » Yesterday, 00:55

Thank you so much for the brilliant article and also summarizing the findings in your response. So much to learn! This helped me a ton. Now to see if I can endure the tearing... I love the G7 monitor except for this Gsync flickering business :(

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jorimt
Posts: 1224
Joined: 04 Nov 2016, 10:44

Re: Vsync + Frame cap similar to G-sync?

Post by jorimt » Yesterday, 20:33

dtanner wrote:
Yesterday, 00:55
Thank you so much for the brilliant article and also summarizing the findings in your response. So much to learn! This helped me a ton. Now to see if I can endure the tearing... I love the G7 monitor except for this Gsync flickering business :(
Glad to hear it was of some use to you ;)

And yes, while some mild flicker is expected, even on native G-SYNC displays (specifically at very low refresh rates, such as during some loading screens), it seems flicker, even in the higher refresh rate range on G-SYNC Compatible FreeSync displays is a common issue, particularly on VA-type panels for whatever reason.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Display: Acer Predator XB271HU OS: Windows 10 Pro MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

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