Correct G-Sync Monitor operation

Hi everyone, I did some testing with my pc (p775dm3-g) with g-sync monitor at 75hz, in fact this happens: g-sync is active from nvidia control panel, start the game without activating its settings v-sync and the game arrives at an average of 140fps ..

If, on the other hand, leaving the g-sync active, then v-sync from the gaming menu, the same gets to a max of 75 fps (as it should be).

Now my question is this (for those who know better the functioning of g-sync):
But once activated by the nvidia control panel, regardless of whether or not I activate v-sync in the various games, it should not automatically run its g-sync and limit the fps to 75 in all games?

 

G-sync has 2 modes:

1. Run up to monitor Hz then allow the FPS to free run beyond that.

Positives: No input lag, Negatives: Screen tearing

2. Run up to the monitor Hz then run as V-sync after that.

Positives: No screen tearing, Negatives: Input lag.

 

so it is normal that with the active g-sync and the v-sync turned off the frames also arrive at 140fps and you have a lot of tearing?

 

Yes, that's normal. G-sync only operates up to the frame rate of the display.

If you have the spare horsepower you can look at things like super resolution to up the quality.

 

The correct way to do it is like this:

1. Activate G-Sync and VSync in the Nvidia Control Panel
2. Disable VSync in-game
3. Limit game to 72 FPS using its built-in FPS limiter
4. If the game does not have a built-in limiter, use RTSS

This way, you get no tearing and the lowest input lag.

Source

 

In fact I turned off v-sync and limited a game at 75 fps and g-sync worked perfectly

 

Here is why you want to enable driver VSync when using G-Sync:

The [refresh rate minus 3] FPS limit is to prevent input lag when you've enabled VSync.

 

You will still get lag if you limit the FPS at that FPS you are just lowering the bar. You are avoiding some weirdness you can get at the handover of monitor refresh as occasionally you can end up with 76fps for instance on a 75hz which it would have to compensate. You are still introducing some lag when it clamps however.

 

fyi your monitor will OC to 100hz

i have the same 75hz Gsync panel, and 100hz is a much better gaming experience.

nvidia control panel - create custom resolution - type in 100hz, hit ok.



and then msi afterburner/rivatuner set frame limit to 96. gsync never turns off.

 

Use CRU. Many games read from EDID and will not recognize custom resolution set in Nvidia Control Panel.

 

yeah I do use CRU as well, I forgot actually, will do

 

where can I find CRU?

 

Have a look in the video description for links etc.

 

https://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU

 

I can't get crew to work on my laptop, I know it does 100hz Gsync through Nviida control panel with 0 issues (gtx 1070 and i7-7820HK laptop)

I tried LCD Standard, 100hz, and it would give me flickering in CRU... I did Nvidia patcher as well, and without the patch. Same issue. I tried manual mode, etc all within CRU... any advice, or can you screenshot your CRU settings for your laptop?

 

Did you try LCD Native or LCD Reduced?

 

Yes, it just fails to show up as a new resolution after a reboot. I did LCD Standard, native, and Reduced. I type in 100hz. Click ok, reboot. and it just doesn't show it as an option.

 

I proceeded like this:
- I set the monitor profile to 100hz
- in nvidia control panel I activated v-sync and g-sync
- with nvidia profile inspector I set 97 fps

I tried to play wolfstein 2 and everything is perfect, the 100hz are spectacular compared to 75 before.

 

I agree. 100hz really is noticeable more fun than 75hz. I played on a 240hz monitor the other day, and the gains are definately diminishing returns... I think 165hz 1440p 27" is the sweet spot. I'm just waiting on prices to come down along with a GSYNC HDR version next year, but for now my laptop 100hz is indeed king.

I still wish I could get CRU to work though, because they are right, some games won't read it unless CRU is doing it.

 

Don't use Nvidia driver limiter. If you check the Blur Busters article I linked on the previous page of this thread, the Nvidia driver limiter was measured to add almost as much input lag as VSync on. Use RTSS to limit FPS if the game doesn't provide a built-in limiter. Wolfenstein II does have its own limiter so idk why you would use an external one.

 

I finally got the 100hz CRU working. lol cheers everyone. I'm setting Rivatuner to 100 as well, I know its best to set it at 97, but meh I just don't care if Vsync is on. lol

 

The gain from 100hz to 144hz is only small so anything above 120hz will do a very nice job for me. People's eyes do vary in this regard so it can help if you can to test like you did and figure out what looks good to you.