G-SYNC 101: Hidden Benefits of High Refresh Rate G-SYNC


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Often overlooked is G-SYNC’s ability to adjust the refresh rate to lower fixed framerates. This can be particularly useful for games hard-locked to 60 FPS, and has potential in emulators to replicate unique signals such as the 60.1Hz of NES games, which would otherwise be impossible to reproduce. And due to the scanout speed increase at 100Hz+ refresh rates, an input lag reduction can be had as well…

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

The results show a considerable input lag reduction on a 144Hz G-SYNC display @60 FPS vs. a 60Hz G-SYNC display @58 FPS with first on-screen reactions measured (middle screen would show about half this reduction). And while each frame is still rendered in 16.6ms, and delivered in intervals of 60 per second on the higher refresh rate display, they are scanned in at a much faster 6.9ms per.



1620 Comments For “G-SYNC 101”

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BlurDawg
Member
BlurDawg

Hello again Jorimt, hope you’re having a great day.

I have a question less related to gsync and more to do with render latency. I’ve noticed as I turn the resolution down, the render latency reduces even at the same fps. In fact I have found that @60fps capped the render latency is around 11.5ms at 1080p compared to 16-18ms latency when capped at 60fps 1440p. At 720p the render latency dropped even further.

As far as I understand, render latency is linked to input latency. Does this mean that for example with console games that are capped at 60fps @4k, the input latency is much higher than it could be if the game was instead rendered at 720p? Since the GPU is doing less work per frame?

AidenJr
Member
AidenJr

Hi, this was exactly what I was looking for, but I still have one unanswered question in my mind.
I’m going to buy a 165hz G-sync monitor, and the game that I play runs around 200 fps. Will I necessarily get screen tear if I don’t cap at 162 ? and do you suggest capping the fps at 162, or playing it on higher graphic settings of the game to stay below the monitor’s refresh rate? like 150 fps or so. Since I play FPS games input lag really matters to me.
Regards

Zole
Member
Zole

After reinstalling windows recently, my G-Sync behaviour has changed.

As far as I can remember, my usual set up was:
League of legends played in Windowed Borderless Mode.
v-sync: disabled – in-game
v-sync: enabled (set to “Fast”) – in NVCP
g-sync: enabled for both windowed and full-screen – in NVCP
preferred refresh rate: Highest available – in NVCP
power management: Prefer maximum performance – in NVCP
Monitor technology: G-SYNC – in NVCP
frame rate: uncapped – in game

With these settings, my frame rate was capped by the fast v-sync to 1 frame below my monitors max refresh rate 164 (down from 165).

However, after reinstalling windows and reapplying these same settings the frame rate is no longer capped to 1 below the monitors refresh rate. Instead I get FPS anywhere from 200-600 and I notice stutters and tearing.

Is there any way for me to get back my previous system behaviour?

PS I know the recommended way to set up a system is for full-screen g-sync but I prefer windowed borderless for the rapid alt tabbing, as I do that frequently.

brdon209
Member
brdon209

I am looking to buy a 1440p 144hz monitor and from what I have read, I should set my FPS at 141 using nvcp, set vsync on in nvcp and off in game. However, many sources have told me to turn on null on and others have told me to completely turn it off. Should I put it on ultra, on or off? I play league of legends fyi and my cpu is usually around 16% usage and my gpu is around 30% uncapped 1080p. Sorry, I am new to th this subject .

georgi74
Member
georgi74

I have a System with a Geforce 3080 and as display I use a LG c9 OLED TV with 120Hz and GSync.

In Nioh 2, which can easily perform over 120 fps with DLSS on 4k with that System if I limit the game to 117 fps with RTSS I get Micro Stutter when just looking around. If I disable the RTSS limiter and let the game limit the fps to 120 (in game there is only an option to lock at 30/60/120) the game is buttery smooth. Is there any way to get the game running smooth with a limit to 117 fps?

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