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.



3860 Comments For “G-SYNC 101”

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asari7k
Member
asari7k

im still a bit confused. so i want to play dbfz at the lowest latency possible bc its a fighting game capped at 60 fps and im playing on a 240hz monitor. so whats better g sync + v sync (in ncvp) on with low latency mode on ultra or just disable g sync and v sync but low latency stil on ultra . bc ive seen some videos on youtube that tested capped 60fps games at higher refres rate and it gives lower latency so when i use g sync is automaticly caps it at 60hz so doesnt that just completly ruin the g sync vs v sync setup ?

user2422
Member
user2422

Thanks for the comprehensive guide.

I have some questions on two topics:

1. If i have a 320Hz monitor with G-Sync enabled and play let’s say Apex Legends capped at 240 fps and can’t notice any obvious screen tearing, is there any reason to still use V-Sync in this scenario? From my understanding the latency in this scenario should be roughly the same whether V-Sync is enabled or disabled, so could it potentially have any other up or downsides? Also regarding this question, the increase in smoothness that is often shown with the optimal G-Sync configuration, is that due to the VRR or is it caused by the combination of G-Sync + V-Sync?

2. There seems to be a lot of situational use for some of these settings, so with all your knowledge and own personal experience over all those years now, what are you personally using when it comes to settings like LLM, Reflex, Windows VRR toggle, in-game vs driver V-Sync, what framerate limiters to use and what value to cap to?

Iriodus
Member
Iriodus

So, 2 separate but related questions:

1) For games that use the Vulkan renderer, like Doom Eternal, should we be using borderless fullscreen or exclusive fullscreen?

2) Not sure if you’d know the answer to this one, but since Proton on Linux uses a DirectX-to-Vulkan translation layer, should people use the recommendation for question 1 above, or say if a game is DirectX11 before taking into account the DX-to-Vulkan translation do use Fullscreen/Exclusive Fullscreen as if we were on Windows.

For reference, I’ve replicated the optimal G-Sync setup on my Linux machine, and since switching I’ve just been doing “If it’s originally DX11 or lower? Fullscreen/Exclusive Fullscreen. If it’s originally DX12? I use borderless fullscreen”

ksydew
Member
ksydew

Sorry for posting so much but I have one last question, I just bought the acer Nitro XV275U F5BIIPPRX, it’s a free sync premium Pro monitor but isn’t g sync certified. It should still work with g sync no problem right? I have it turned on same usual settings, g sync indicator is working and on in the top right corner, but just want to make sure it’s fine? It seems like it is but I’m not the expert

ksydew
Member
ksydew

With the newest drivers nvidia has now gotten rid of the nvidia control panel. Does this change anything for how to implement g sync? Has it changed any behavior to your knowledge? I keep g sync on, v sync on and use a frame rate limiter of RTSS. I also use v sync globally. I just had to use DDU due to sudden instability after installing the newest drivers and that’s when I found out nvcp was missing.

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