G-SYNC 101: Optimal G-SYNC Settings & Conclusion


Optimal G-SYNC Settings*

*Settings tested with a single G-SYNC display (w/hardware module) on a single desktop GPU system; specific DSR, SLI, and multi-monitor behaviors, as well as G-SYNC laptop display and “G-SYNC Compatible” display implementation, may vary.

Nvidia Control Panel Settings:

  • Set up G-SYNC > Enable G-SYNC, G-SYNC Compatible > Enable for full screen mode.
  • Manage 3D settings > Vertical sync > On (Why?).

In-game Settings:

  • Use “Fullscreen” or “Exclusive Fullscreen” mode (some games do not offer this option, or label borderless windowed as fullscreen).
  • Disable all available “Vertical Sync,” “V-SYNC” and “Triple Buffering” options.
  • If an in-game or config file FPS limiter is available, and framerate exceeds refresh rate:
    Set (a minimum of) 3 FPS limit below display’s maximum refresh rate (57 FPS @60Hz, 97 FPS @100Hz, 117 FPS @120Hz, 141 FPS @144Hz, etc).

RTSS Settings:

  • If an in-game or config file FPS limiter is not available and framerate exceeds refresh rate:
    Set (a minimum of) 3 FPS limit below display’s maximum refresh rate (see G-SYNC 101: External FPS Limiters HOWTO).

Windows “Power Options” Settings:

Windows-managed core parking can put CPU cores to sleep too often, which may increase frametime variances and spikes. For a quick fix, use the “High performance” power plan, which disables OS-managed core parking and CPU frequency scaling. If a “Balanced” power plan is needed for a system implementing adaptive core frequency and voltage settings, then a free program called ParkControl by Bitsum can be used to disable core parking, while leaving all other power saving and scaling settings intact.

Blur Buster's G-SYNC 101: Input Lag & Optimal Settings

Mouse Settings:

If available, set the mouse’s polling rate to 1000Hz, which is the setting recommended by Nvidia for high refresh rate G-SYNC, and will decrease the mouse-induced input lag and microstutter experienced with the lower 500Hz and 125Hz settings at higher refresh rates.

mouse-125vs500vs1000

Refer to The Blur Busters Mouse Guide for complete information.

Nvidia Control Panel V-SYNC vs. In-game V-SYNC

While NVCP V-SYNC has no input lag reduction over in-game V-SYNC, and when used with G-SYNC + FPS limit, it will never engage, some in-game V-SYNC solutions may introduce their own frame buffer or frame pacing behaviors, enable triple buffer V-SYNC automatically (not optimal for the native double buffer of G-SYNC), or simply not function at all, and, thus, NVCP V-SYNC is the safest bet.

There are rare occasions, however, where V-SYNC will only function with the in-game option enabled, so if tearing or other anomalous behavior is observed with NVCP V-SYNC (or visa-versa), each solution should be tried until said behavior is resolved.

Maximum Pre-rendered Frames: Depends

A somewhat contentious setting with very elusive consistent documentable effects, Nvidia Control Panel’s “Maximum pre-rendered frames” dictates how many frames the CPU can prepare before they are sent to the GPU. At best, setting it to the lowest available value of “1” can reduce input lag by 1 frame (and only in certain scenarios), at worst, depending on the power and configuration of the system, the CPU may not be able to keep up, and more frametime spikes will occur.

The effects of this setting are entirely dependent on the given system and game, and many games already have an equivalent internal value of “1” at default. As such, any input latency tests I could have attempted would have only applied to my system, and only to the test game, which is why I ultimately decided to forgo them. All that I can recommend is to try a value of “1” per game, and if the performance doesn’t appear to be impacted and frametime spikes do not increase in frequency, then either, one, the game already has an internal value of “1,” or, two, the setting has done its job and input lag has decreased; user experimentation is required.

Conclusion

Much like strobing methods such as LightBoost & ULMB permit “1000Hz-like” motion clarity at attainable framerates in the here and now, G-SYNC provides input response that rivals high framerate V-SYNC OFF, with no tearing, and at any framerate within its range.

As for its shortcomings, G-SYNC is only as effective as the system it runs on. If the road is the system, G-SYNC is the suspension; the bumpier the road, the less it can compensate. But if set up properly, and run on a capable system, G-SYNC is the best, most flexible syncing solution available on Nvidia hardware, with no peer (V-SYNC OFF among them) in the sheer consistency of its frame delivery.

Feel free to leave a comment below, resume the discussion in the Blur Busters Forums, or continue to the Closing FAQ for further clarifications.



273 Comments For “G-SYNC 101”

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Phroster
Member
Phroster

Why is it, that in most games, borderless fullscreen + gsync, gives worse results then exclusive full screen mode? (uneven frametimes, micro stutters)
Using a frame limiter to set the framerate -3 below the refresh rate makes it even worse when using borderless fullscreen.

I did find that G-sync + Fast sync + borderless fullscreen seems to give better results in some games. Still limiting the frame rate in borderless fullscreen, introduces microstutters.

Why is borderless fullscreen so unreliable with gsync enabled?

jdawg
Member
jdawg

Hey, so I didn’t know about turning on V-sync in NVCP only, but before I did that I was getting the occasional stutter even though the action on screen wasn’t that intense. I have RTSS showing a graph of FPS and I notice there are several little dips happening every second. The game moves smooth but then I get the stutter occasionally. I’ve closed everything unnecessary but maybe there’s more to close…not sure what other processes I can close in Windows 10 and I haven’t done any optimizations like in Windows 7.

Fast forward to setting it up as recommended here (141 FPS limit in game for my 144Hz monitor, G-sync on, V-sync ON in NVCP only, V-sync OFF in-game) and I noticed that the dips on the graph are even deeper…however I haven’t seen a stutter yet and the game plays very smooth with no lag. Any explanation for those dips in the graph though?

metalpizza123
Member
metalpizza123

Hi hi, Just a quick heads up for users with several displays of varying refresh rates. Windows will sometimes only report the lowest refresh rate monitor as the system-wide V-Sync target. After testing on driver ver 436.02, with 3 different monitors, here are my findings. I testeed with 3 games, all had similar behaviour. I used the recommended settings as per the guide.
NVCP V-sync ON
Gsync Enabled
Ingame FPS Limiter or RTSS used
Ingame Vsync/buffering disabled

Main monitor :G-Sync, 144hz.
Second Monitor 60 Hz
In game Framerate 60~

Main monitor :G-Sync, 144hz
Second monitor 75 Hz
In game Framerate 75~

Main monitor G-sync,144hz
Second monitor, 60hz
third monitor, 75hz
In game framerate 60~

Only main monitor: G-Sync 144hz
In game frame rate 140~

There’s probably a way to disable this, but for now I’ve resorted to just unplugging my other monitors. Just a note for any multi monitor users. I wish I could test more, but I just wanna play games.

kucki
Member
kucki

Should we use the “Low Latency Mode” On or Ultra with G-Sync?

Chief Blur Buster
Admin

Possibly beneficial for uncapped GSYNC + VSYNC ON. Will need to be tested.

This will reduce lag differential of below-Hz (GSYNC behavior) versus match-Hz (VSYNC ON behavior).

Creakffm
Member
Creakffm

Hello Guys, really Intresting Article/Guide but i wanna know something from you.

i Playing Games since 20 Years i know in Old Times with 60 HZ Monitors i play Competitive Games with VSYNC off to get most FPS ingame.

So back to 2019.

Im Using a Nvidia Geforce 1080 TI and my Monitor is 240 HZ DELL Alienware AW2518HF with GSYNC on Displayport Cable.

i wanna Optimizing all to Play Competitive. Actual i play with Ingame Fortnite Framerate Limit 240 HZ because see this by a lot of People.

When i wanna get less Inputlag i set in Nvidia Inspector Framerate Limiter to 245,244 ( more FPS than HZ or less and than which one is best? )

thanks for Answering

wpDiscuz