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,” “Double Buffer,” and “Triple Buffer” 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).

OR

Nvidia “Max Frame Rate” Settings*:

*Introduced in Nvidia driver version 441.87

  • If an in-game or config file FPS limiter is not available and framerate exceeds refresh rate:
    Set “Max Frame Rate” to “On,” and adjust slider to (a minimum of) 3 FPS limit below display’s maximum refresh rate.

Low Latency Mode* Settings:

*This setting is not currently supported in DX12 or Vulkan.

  • If an in-game or config file FPS limiter is not available, RTSS is prohibited from running, a manual framerate limit is not required, and framerate exceeds refresh rate:
    Set “Low Latency Mode” to “Ultra” in the Nvidia Control Panel. When combined with G-SYNC + V-SYNC, this setting will automatically limit the framerate (in supported games) to ~59 FPS @60Hz, ~97 FPS @100Hz, ~116 FPS @120Hz, ~138 FPS @144Hz, ~224 FPS @240Hz, etc.
  • If an in-game or config file FPS limiter, and/or RTSS FPS limiter is available, or Nvidia’s “Max Frame Rate” limiter is in use, and framerate does not always reach or exceed refresh rate:
    Set “Low Latency Mode” to “On.” Unlike “Ultra,” this will not automatically limit the framerate, but like “Ultra,” “On” (in supported games that do not already have an internal pre-rendered frames queue of “1”) will reduce the pre-rendered frames queue in GPU-bound situations where the framerate falls below the set (in-game, RTSS, or Nvidia “Max Frame Rate”) FPS limit.

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

*As of Nvidia driver version 436.02, “Maximum pre-rendered frames” is now labeled “Low Latency Mode,” with “On” being equivalent to MPRF at “1.”

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.



1917 Comments For “G-SYNC 101”

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vizionblind
Member
vizionblind

Hello,

I have a 165 HZ monitor (the Gigabyte M32Q) and I mostly play FPS games and Open World Games. Just trying to understand if I need to do anything besides enablge gsync and vsync on in NVCP.
https://www.amazon.com/dp/B0968QT6SS?ref=ppx_yo2_dt_b_product_details&th=1

roro13200
Member
roro13200

Hello
I have a 165hz gsync compatible screen, and an rtx 2060.
I mainly play fighting games which are capped at 60fps.
what are the parameters that you advise?
thank you and sorry for my english!

Dan_G_303
Member
Dan_G_303

Hi Jorim, thanks for this guide. I had a question – I have a 144 Hz G-sync compatible screen (AOC AG241QX) but prefer capping to 60 fps, as for some games this is near the max fps my PC can produce, and I prefer a consistent refresh rate no matter the content, rather than running some games at 60 fps and less demanding games at higher fps (this also keeps me from spending too much money on a high end GPU as I’m not always chasing 144 fps !). I have refresh rate in Windows display settings set to 60 Hz too so that just normal desktop use is also consistent.

As far as I understand, for exclusive fullscreen games the Windows refresh rate setting is overwritten and the screen’s max refresh rate is used instead (144 Hz in my case) so that any fps cap ~3fps or more under the screen’s refresh rate will do the job of keeping the fps within the G-SYNC range (for my screen this would be a fps cap anywhere between 141-30 fps and I prefer to set it to 60fps).

However – for games that don’t have proper exclusive fullscreen (or those where borderless fullscreen is more convenient) the refresh rate seems to stick to the Windows display setting (60 Hz in my case). For these games should the fps limit be 57fps, or would 60fps still work?

Also for information – on my screen there appears to not be any built in hardware setting to set the refresh rate (i.e. in the screen’s OSD) – otherwise that would solve it.

Thanks.

SkaKunK
Member
SkaKunK

Hi jorimt. I am Spanish. I hope you understand me well.

I recently bought a LG C1 OLED 120Hz Gsync compatible TV and a nvidia 3060ti. My problem is that I have micro stuttering and it seems strange to me because while the Afterburner statistics say that I am playing for example at a constant 60fps 16.6, in the GSYNC menu of the TV I can see that the fps vary a lot and all the time; 63,70,57 , 52.

In some games they vary less than in others. I’m confused. I thought they would vary from 59 to 60 at most. How can it be that on the PC it tells me a constant 60fps 16.6ms and on the TV it doesn’t? I just activate vertical sync in the game (without GSYNC) and RTSS limiter at 60fps and I feel it better and smooth.

What could be the problem?. Thanks for advance 🙂

gsyncnoob2
Member
gsyncnoob2

Hello @jorimit,

Thanks for putting those together really helpful!

I used G+VSYNC in NVCP and in game(world of tanks) fps_max @141, however I noticed that the fps is staying at 124-125hz on my 144hz monitor, if I change fps_max to 144, it stables at 143-144hz, I am kinda new to gsync, but is it the expected behavior? I thought this setup should stay at 144hz.

Thanks!

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