VRR Issues
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Shocktrooper




Posts: 4536

PostPosted: Mon, 30th Jun 2025 19:36    Post subject: VRR Issues
Using S95C TV with VRR which is detected as G-Sync Compatible on PC

I tried the Pendulum Demo and it is working fine (jumping between 80hz and 120hz for 40-60fps), pendulum always smooth

But 3D Games all stutter like hell with VRR, tried both AC: Origins and a COD Remastered, there is very noticeable stutter every 1-2 seconds when looking around.
It's actually better when VRR is turned off. Without VRR I get these constant small stutters, like on a non-G-Sync display, with VRR it does those huge stuttering jumps every few seconds.
I don't understand Dude Sad
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Frant
King's Bounty



Posts: 24607
Location: Your Mom
PostPosted: Sat, 19th Jul 2025 15:21    Post subject:
It doesn't support G-SYNC!

Quote:
The Samsung S95C is not officially compatible with Nvidia G-Sync, but it supports AMD FreeSync Premium Pro, which provides similar variable refresh rate (VRR) functionality.


Quote:
S95C TV Specifications
Screen type: Quantum Dot OLED
Refresh rate: 120Hz
HDR support: HDR10, HDR10+, HLG
Audio support: Dolby Atmos, DTS
Smart TV: Tizen
HDMI ports: 4 HDMI 2.1
Built-in tuner: ATSC 3.0
Screen size: 65 inches
Resolution: 3,840 x 2,160
Video inputs: HDMI, RF, USB
Screen brightness: 888.9 nits
Black level: Not specified
Contrast ratio: Infinite
Refresh rate (1080p120): 1.8 ms
AMD FreeSync: FreeSync
Nvidia G-Sync: None


Quote:
The S95C OLED TV has been reported to experience G-SYNC stutter issues, particularly when used as a PC monitor. Users have noted that enabling G-SYNC can sometimes lead to stuttering, especially in games with fluctuating frame rates or demanding graphical scenes.
Some users have found that disabling G-SYNC or using VRR Control can help reduce flicker and stutter.

Additionally, users have reported that certain settings, such as enabling V-SYNC in the NVIDIA Control Panel, can exacerbate stuttering. It is recommended to experiment with different configurations, such as capping the frame rate to a multiple of the monitor's refresh rate or using tools like RivaTuner Statistics Server (RTSS) to smooth out frame pacing.


Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!

"The sky was the color of a TV tuned to a dead station" - Neuromancer
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Shocktrooper




Posts: 4536

PostPosted: Sat, 19th Jul 2025 15:27    Post subject:
I know but it shows as G-Sync compatible,I thought that should be enough to get stutter free gaming at varying framerates, even with Nvidia GPU?

Quote:

Native Refresh Rate
144 Hz
Variable Refresh Rate
Yes
HDMI Forum VRR
Yes
FreeSync
Yes
G-SYNC Compatible
Yes
4k VRR Maximum
144 Hz
4k VRR Minimum
< 20 Hz


https://www.rtings.com/tv/reviews/samsung/s95c-oled#test_2188

The pendulum demo is working fine so that is strange.
Maybe I didn't test enough games or there is something in Nvidia Inspector I got to change?
However I tried the same COD on the FreeSync Laptop display I got and there the variable refresh is definitely working without stutter.

Frant wrote:

The S95C OLED TV has been reported to experience G-SYNC stutter issues, particularly when used as a PC monitor. Users have noted that enabling G-SYNC can sometimes lead to stuttering, especially in games with fluctuating frame rates or demanding graphical scenes.
Some users have found that disabling G-SYNC or using VRR Control can help reduce flicker and stutter.

Additionally, users have reported that certain settings, such as enabling V-SYNC in the NVIDIA Control Panel, can exacerbate stuttering. It is recommended to experiment with different configurations, such as capping the frame rate to a multiple of the monitor's refresh rate or using tools like RivaTuner Statistics Server (RTSS) to smooth out frame pacing.


That is interesting, so it might be a firmware issue? Sounds like an AI answer though.
I tried all V-Sync configurations. There is no VRR Control option. Not sure RTSS will work..maybe worth a try.
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pho08




Posts: 2649

PostPosted: Tue, 22nd Jul 2025 16:00    Post subject:
have you tried setting (exclusive) fullscreen ingame?
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SumZero




Posts: 1981

PostPosted: Tue, 22nd Jul 2025 16:22    Post subject:
Shocktrooper wrote:
I know but it shows as G-Sync compatible,I thought that should be enough to get stutter free gaming at varying framerates, even with Nvidia GPU?

G-Sync and G-Sync compatible are not the same.

From my experience and talking to Avi, G-Sync compatible really just means: Freesync and wish you luck on G-Sync it should be ok more than 1/2 the time. G-sync is certified to work with G-sync cards. Freesync (G-Sync compatible) is "It works but we didn't test all situations. Your mileage may vary"

I (well he...he has a LOT more daily experience on customers rigs) have yet to see a situation freesync works flawlessly with Nvidia GPU across the board for games.
None of the freesync monitors in my house is trouble free trying to use g sync. My sons PC it's just turned off, 1/2 his games sucked in it. My daughters is better but she only plays 3 games and they all are fine.

G-Sync monitors have an embedded G-sync module your card talks back and forth to. G-Sync compatible (freesync) has a freesync module that is middle man that translates between what your monitor wants, and what g-sync wants (kinda..but rough enough analogy).

https://www.wepc.com/gaming-monitor/compare/g-sync-vs-g-sync-compatible/
Quote:
While the primary function is the same, G-Sync monitors have direct communication pathways with the GPU, which potentially results in a more reliable performance. Meanwhile, G-Sync compatibility relies on the standard protocols and may experience a few variations (which depend a lot on the monitor and GPU being used).


Stormwolf - "Who cares about some racial stuff, certainly not the victims."

- Democracy Dies in Dumbness.
- Watching people my age grow from cynical youth who distrusts and dismisses the older generation, into cynical old people who distrusts and dismisses younger generations.
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Shocktrooper




Posts: 4536

PostPosted: Tue, 22nd Jul 2025 18:55    Post subject:
pho08 wrote:
have you tried setting (exclusive) fullscreen ingame?


Yeah, both games I tried have exclusive fullscreen, I have the opposite problem with borderless fullscreen not working. AC Oranges forces me back to exclusive fullscreen every time. Don't believe that issue is connected though.

@SumZero
I know about the seperate G-Sync chip but didn't expect there still to be so many problems in practice with FreeSync after all those years. Sounds like some of it may be intentional..
Gotta test more games when I have time.
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SumZero




Posts: 1981

PostPosted: Tue, 22nd Jul 2025 19:10    Post subject:
I don't think it's intentional. More freesync can only do so much to be compatible with proprietary hardware modules they cant see the raw specs and 'workings' of since its Nvidia property.
Nvidia made it, Gsync is directly connected. Freesync just gets to talk thru 'API' to it, so to speak.
They could reverse engineer one, but that's a whole legal can of worms if they did.

I see it sort of like using a USB adapter, to old PS2 for a mouse. Both interfaces are valid mouse interfaces. But using a PS2 mouse through adapters to get USB to talk to it expect weird compatibility issues in some software.


Stormwolf - "Who cares about some racial stuff, certainly not the victims."

- Democracy Dies in Dumbness.
- Watching people my age grow from cynical youth who distrusts and dismisses the older generation, into cynical old people who distrusts and dismisses younger generations.
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Frant
King's Bounty



Posts: 24607
Location: Your Mom
PostPosted: Tue, 22nd Jul 2025 22:24    Post subject:
It boils down to the TV not having/supporting G-SYNC. You're out of luck. I guess you have to use normal v-sync.

Quote:
It’s worth noting that while the Samsung S95C does have VRR support, it is not currently compatible with Nvidia’s G-Sync. This is because G-Sync is a proprietary technology developed by NVIDIA, and it is only available on select gaming monitors and TVs.

That being said, AMD’s FreeSync technology is just as capable as G-Sync, and it offers a broader range of compatibility with different hardware. So while the Samsung S95C is not compatible with G-Sync, in no case does it downgrade it as an excellent option for gamers looking for the ultimate TV for gaming purposes.


Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!

"The sky was the color of a TV tuned to a dead station" - Neuromancer
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