how many versions of gsync are there?

Talk about NVIDIA G-SYNC, a variable refresh rate (VRR) technology. G-SYNC eliminates stutters, tearing, and reduces input lag. List of G-SYNC Monitors.
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Fighter
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how many versions of gsync are there?

Post by Fighter » 04 Nov 2020, 01:15

in this review on tftcentral:
https://www.tftcentral.co.uk/reviews/as ... g259qn.htm
they wrote the following:

"One important note here also is that despite using the v2 G-sync module this screen does not need an active cooling fan like other earlier uses of this chip. Instead Asus have used a reasonably large heatsink to help dissipate the heat, which will please those who were worried about having an audible fan for sure."

also,
1 - 360Hz via DisplayPort
1 - 240Hz via HDMI

while older gsync like in my xg2703-gs are starting at 30hz minimum

so is this the latest one? how many screens use this v2 gsync with 1hz minimum range?

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jorimt
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Re: how many versions of gsync are there?

Post by jorimt » 04 Nov 2020, 09:21

Fighter wrote:
04 Nov 2020, 01:15
"One important note here also is that despite using the v2 G-sync module this screen does not need an active cooling fan like other earlier uses of this chip. Instead Asus have used a reasonably large heatsink to help dissipate the heat, which will please those who were worried about having an audible fan for sure."
Not 100% sure here, but as far as I'm aware, the primary feature of the G-SYNC v2 module is HDR support. HDR has a higher peak brightness, which heats the panel more, thus requiring active cooling (aka an internal fan with heatsink).

But since the PG259QN is only capable of the HDR 400 standard, it probably doesn't get hot enough to need a fan, especially with ASUS' heatsink.
Fighter wrote:
04 Nov 2020, 01:15
while older gsync like in my xg2703-gs are starting at 30hz minimum

so is this the latest one? how many screens use this v2 gsync with 1hz minimum range?
That's not related to the v2 module version, as barring the very first G-SYNC displays released years ago, all G-SYNC displays containing modules can reach an effective 1Hz via LFC.

The 30Hz number is the minimum physical refresh rate supported when not using LFC.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: Acer Predator XB271HU / LG 48CX OS: Windows 10 MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

Fighter
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Re: how many versions of gsync are there?

Post by Fighter » 04 Nov 2020, 10:19

interesting. usually with my viewsonic xg2703-gs monitor, when the fps is at 30, for example when using windows 10 apps, the window starts to stutter very bad when gsync is on. does that have anything to do with the lfc we're talking about?

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jorimt
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Re: how many versions of gsync are there?

Post by jorimt » 04 Nov 2020, 10:32

Fighter wrote:
04 Nov 2020, 10:19
interesting. usually with my viewsonic xg2703-gs monitor, when the fps is at 30, for example when using windows 10 apps, the window starts to stutter very bad when gsync is on. does that have anything to do with the lfc we're talking about?
Not directly to do with LFC, no.

Are you seeing this when interacting with apps on a secondary monitor (while playing the game on your primary)?

G-SYNC isn't meant for Windows apps, as they aren't coded for it, so when it engages, an arbitrary framerate/refresh rate (dependent on the app) is applied and the app stutters when it is focused on or dragged.

For this reason, I recommend the below (from my G-SYNC 101 Closing FAQ):
https://blurbusters.com/gsync/gsync101- ... ttings/15/
Your “Optimal G-SYNC Settings” say I should only “Enable [G-SYNC] for full screen mode” in the NVCP, but what about for games that don’t offer an exclusive fullscreen option?

My Optimal G-SYNC Settings are just that: optimal.

Thus, while G-SYNC (and any game with any syncing solution, for that matter) typically performs best in exclusive fullscreen, it is true that not all games support this mode, so use of G-SYNC’s “Enable for windowed and fullscreen mode” is necessary for games that only offer a borderless or windowed option.

Do note, however, that G-SYNC’s “Enable for windowed and full screen mode” can apply to non-game apps as well, which will result in stutter and slowdown when affected app windows are dragged and/or focused on due to unintended VRR (variable refresh rate) behavior.

As such, it is recommended to keep G-SYNC set to “Enable for full screen mode” globally, and then to use Nvidia Profile Inspector (download here) to set both “G-SYNC – Application Mode” and “G-SYNC – Global Mode” to “Fullscreen and Windowed” per game profile, as needed:

Image
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: Acer Predator XB271HU / LG 48CX OS: Windows 10 MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

Fighter
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Re: how many versions of gsync are there?

Post by Fighter » 04 Nov 2020, 11:36

i don't use a secondary monitor, i have only the xg2703-gs
too bad gsync can't be disabled under specific fps amount like 30 and under

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jorimt
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Re: how many versions of gsync are there?

Post by jorimt » 04 Nov 2020, 11:55

Fighter wrote:
04 Nov 2020, 11:36
too bad gsync can't be disabled under specific fps amount like 30 and under
That would not be useful, as your system would then drop out of the G-SYNC range at the low end and get tearing with V-SYNC off, or V-SYNC input lag and stutter with V-SYNC on.

LFC (Low Framerate Compensation) allows G-SYNC to effectively function down to 1Hz in-game.

Like I said, if you don't want G-SYNC to affect unsupported desktop apps, follow my previous instructions (set G-SYNC to "Enable for full screen mode" under "Set up G-SYNC" in the NVCP), and set G-SYNC borderless/windowed mode as needed per game instead via Nvidia Inspector.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: Acer Predator XB271HU / LG 48CX OS: Windows 10 MB: ASUS ROG Maximus X Hero CPU: i7-8700k GPU: EVGA GTX 1080 Ti FTW3 RAM: 32GB G.SKILL TridentZ @3200MHz

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