G-SYNC 101: Closing FAQ


“Let me get this straight…”

“Closing FAQ” published Jan 25, 2019

G-SYNC 101 has been around long enough now to have accumulated some frequently asked follow-up questions from readers, both in the comments sections here and in the Blur Busters Forums.

To avoid further confusion or repeat questions, I have compiled a selection of them below for easier access. This section may change and grow as time goes by, so check back here regularly for updates before asking your question.



1149 Comments For “G-SYNC 101”

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AlianosFN
Member
AlianosFN

Hi, I have a question.

I play Fortnite competitively on a 165 Hz 1440p monitor with a GTX 1070 Ti using pretty much all the settings you recommended in this thread (gsync ON, vsync ON, game on fullscreen, fps limited in game files to 162, and finally low latency mode ON).

Now since the nvidia driver update from today got released the new nvidia Reflex Low Latency setting was added to the game. With the setting come 3 options: OFF, ON or ON + BOOST. A thing i noticed when i turned it to either ON or ON + BOOST was that instead of my fps cap being 162, my fps got capped at 158 (so 4 frames lower than the limit i set myself).

This raised a question;
Does turning the setting ON (or ON + BOOST) impact the way gsync works (also in combination with the other recommended settings in this thread)?
If so, what would you recommend me to do? Should i keep the nvidia reflex setting off? Or should i keep it on (since according to nvidia it reduces system delay) and change my fps cap to make up for the 4 frames i lost?

Ultimately i think my question is; how does the nvidia reflex low latency setting fit in the picture with gsync and the recommended settings in this thread?

Thanks in advance for taking the time to read/answer to my questions!

tomato884
Member
tomato884

does this apply to the new 30xx series with all the new reflex technology?

JediBrysen
Member
JediBrysen

should competitive players for any game but for my situation fortnite use this? I really just want low input delay while it being smooth

ankurszn
Member
ankurszn

i have the same question

Avean
Member
Avean

Could LLM = On with G-Sync cause frametime spikes in cases where the game uses its own frame queue? Cause in the end of the article you say you recommend testing this on per-game basis to see if worse or not. And if at best youre improving latency by 1 frame, its kinda best to leave it off i feel? Unless you want to fire up RivaTuner and monitor each game to see if improvements. But really the biggest impact is more framerate than whatever setting your LLM is at, feel people are kinda hung up on this setting 🙂

Glarbstintenford
Member
Glarbstintenford

Amazing guide and information, thank you so much!

I have a questions or two, sorry this ends up being so long but I wanted to also share the information I found and make it as clear as possible:

1 – Does the use of the smoothframes feature found in Unreal Engine 4 have any effect? I’m not sure how smoothframes & in game Vsync relate to each other with or without G-Sync and thought you could shed some light.

The game I play is online multiplayer only, and their servers currently run 30Hz tickrate, which in the near future will be increasing to 60Hz tickrate.

It has smoothframes and vsync enabled by default, using the default 22-62FPS range for smoothframes, with no in-game option to disable either or set an FPS limit. It also has what I am assuming is an in-game FPS limiter that you can manually adjust via editing the ini files. This line is FrameRateLimit= and the default is =0.000000.

Also just so you know this game has no in-game settings other than a resolution scale slider that’s it, and only runs in borderless fullscreen.

However you can edit GameUserSettings.ini and disable/enable vsync & smoothframes.

Now with or without G-Sync enabled I have discovered the following:

– If I use the games default settings of vsync and smoothframes enabled and FrameRateLimit=0 I am limited to 62FPS regardless of desktop refresh rate provided that my desktop refresh rate is higher than 63Hz **However if I set FrameRateLimit to any number up to and including 120 then my FPS limited to that number unless my desktop refreshrate is lower than the value set in FrameRateLimit= in which case it is limited to desktop refresh rate.

– If I disable in-game vsync and leave smoothframes enabled I am still limited to 62FPS regardless of desktop refresh rate if FrameRateLimit=0

– If I keep in-game vsync enabled and only disable smoothframes my FPS is capped to desktop refresh rate but only to 120 any refresh rate above that I’m still limited to 120FPS. Also worth noting this is when leaving FrameLimit=0.000000

– If I disable in-game vsync & disable smoothframes and FrameRateLimit=0 then my FPS is uncapped.

Wonderinig if smoothframes should be enabled or disabled, as well as if using FrameRateLimit should be used and am curious what your thoughts are about it all.

Thank you! 🙂

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