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.



2431 Comments For “G-SYNC 101”

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elexi
Member
elexi

Thanks for this Guide!
i already use gsync on + vsync on + 141 FPS LOCK on 144 hz screen.
some questions:
1) I often play VR games. Does Gsync + vsync combo somehow affect VR performance?
2) Is it combo good for Gsync-compatible screen, like mine LG UltraGear 27GL83A-B ?
3) And should i use LLM On or should i set in on AUTO (now i play with auto)? I mostly play non cybersport dx12/vulkan games
4) Does DSR DLDSR tech affect gsyncvsync combo and lag?

CorvusCorax
Member
CorvusCorax

I have read the entire guide. However, I have one question that is bothering me and I can’t find a reasonable answer anywhere. I have a monitor with a refresh rate of 240Hz, but I can’t use G-Sync. What happens if I set the frame limit to e.g. 100fps and turn on V-sync?

richardjohnsonfa
Member
richardjohnsonfa

If I have a amd gpu and freesync monitor, shall I follow your optimal settings but using freesync instead of g sync and amd chill fps limiter 3 fps under my monitors refresh rate instead of nvcp’s fps limiter. So it would essentially be freesync (using amd software) + v sync (using amd software or in game) + -3 fps below refresh rate limiter (using amd software, i.e. amd chill, or in game). Would it work the same as in your optimal settings? Thanks jorimt 🙂

Scandaal
Member
Scandaal

What do I need to set in the NVCP display settings if I use G Sync, I have an ASUS VG248QG 165HZ monitor.

At the moment I have No Scaling + Display set

Scandaal
Member
Scandaal

Hello I play WarZone 2 and I am interested in the G SYNC + V Sync setting, I currently have G Sync and V Sync enabled (In NVCP), also I enabled NVIDIA Reflex in the game settings and now my FPS is limited to 158fps (Monitor 165hz).

Can you tell me the optimal G Sync settings for this game, maybe there are better options to get optimal smoothness without frame tearing and micro staters

RTX 3060 / 12400 5Ghz / 3466 CL14

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