Monitor GSYNC 240HZ !

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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joris2a
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Monitor GSYNC 240HZ !

Post by joris2a » 03 Jun 2020, 10:01

Hello ! Here I took a long time to navigate on this site to understand how the gsync works with all the other techno but I did not get an answer to my questions, here I have a screen acer predator 240 HZ g-sync certified , and I don't understand certain things, I play competitive high level games like apex legends, fortnite, I understood that the GSYNC was very useful so I activated it, only I don't understand why there is who says who should put the vsync coupled with the gsync and others say not, for me the vsync and the parameters to avoid in video games, so can you enlighten me? when we have gsync should we activate vsync ?? other questions concerning ultra latency mode should you activate it too?

I specify that ingame I do not exceed 200 fps!

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jorimt
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Re: Monitor GSYNC 240HZ !

Post by jorimt » 03 Jun 2020, 10:15

joris2a wrote:
03 Jun 2020, 10:01
when we have gsync should we activate vsync ??
G-SYNC 101: Closing FAQ, entry #2...
https://blurbusters.com/gsync/gsync101- ... ttings/15/
Wait, why should I enable V-SYNC with G-SYNC again? And why am I still seeing tearing with G-SYNC enabled and V-SYNC disabled? Isn’t G-SYNC suppose to fix that?

The answer is frametime variances.

“Frametime” denotes how long a single frame takes to render. “Framerate” is the totaled average of each frame’s render time within a one second period.

At 144Hz, a single frame takes 6.9ms to display (the number of which depends on the max refresh rate of the display, see here), so if the framerate is 144 per second, then the average frametime of 144 FPS is 6.9ms per frame.

In reality, however, frametime from frame to frame varies, so just because an average framerate of 144 per second has an average frametime of 6.9ms per frame, doesn’t mean all 144 of those frames in each second amount to an exact 6.9ms per; one frame could render in 10ms, the next could render in 6ms, but at the end of each second, enough will hit the 6.9ms render target to average 144 FPS per.

So what happens when just one of those 144 frames renders in, say, 6.8ms (146 FPS average) instead of 6.9ms (144 FPS average) at 144Hz? The affected frame becomes ready too early, and begins to scan itself into the current “scanout” cycle (the process that physically draws each frame, pixel by pixel, left to right, top to bottom on-screen) before the previous frame has a chance to fully display (a.k.a. tearing).

G-SYNC + V-SYNC “Off” allows these instances to occur, even within the G-SYNC range, whereas G-SYNC + V-SYNC “On” (what I call “frametime compensation” in this article) allows the module (with average framerates within the G-SYNC range) to time delivery of the affected frames to the start of the next scanout cycle, which lets the previous frame finish in the existing cycle, and thus prevents tearing in all instances.

And since G-SYNC + V-SYNC “On” only holds onto the affected frames for whatever time it takes the previous frame to complete its display, virtually no input lag is added; the only input lag advantage G-SYNC + V-SYNC “Off” has over G-SYNC + V-SYNC “On” is literally the tearing seen, nothing more.

For further explanations on this subject see part 1 “Control Panel,” part 4 “Range,” and part 6 “G-SYNC vs. V-SYNC OFF w/FPS Limit” of this article, or read the excerpts below…
--------
joris2a wrote:
03 Jun 2020, 10:01
other questions concerning ultra latency mode should you activate it too?
G-SYNC 101: Optimal G-SYNC Settings & Conclusion...
https://blurbusters.com/gsync/gsync101- ... ttings/14/
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 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.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

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

joris2a
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Re: Monitor GSYNC 240HZ !

Post by joris2a » 03 Jun 2020, 10:54

ok so better gsync on and vsync off?

TTT
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Re: Monitor GSYNC 240HZ !

Post by TTT » 03 Jun 2020, 11:07

Basically Vsync on with Gsync below monitor refresh isn't the same setting as Vsync on its own.

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jorimt
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Re: Monitor GSYNC 240HZ !

Post by jorimt » 03 Jun 2020, 11:16

joris2a wrote:
03 Jun 2020, 10:54
ok so better gsync on and vsync off?
If you don't want any tearing with G-SYNC, use G-SYNC on + V-SYNC on + a minimum -3 FPS limit (of your refresh rate; 141 fps @144Hz, 237 FPS @240Hz, etc) to keep G-SYNC in it's range at all times. G-SYNC on + V-SYNC on won't add more input lag than G-SYNC + V-SYNC off within the G-SYNC range, only prevent 100% of tearing.

Optimal G-SYNC settings are here for repeat reference:
https://blurbusters.com/gsync/gsync101- ... ttings/14/
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

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

joris2a
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Re: Monitor GSYNC 240HZ !

Post by joris2a » 03 Jun 2020, 12:02

OK fine ! another question, I do not reach the constant 237 fps on my favorite games, and my proc and CG are at 100% when I cap at 237, it is better if I cap at 200 for my pc and performance? what do i lose from blocked at 200 fps rather than 240?

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jorimt
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Re: Monitor GSYNC 240HZ !

Post by jorimt » 04 Jun 2020, 10:58

joris2a wrote:
03 Jun 2020, 12:02
OK fine ! another question, I do not reach the constant 237 fps on my favorite games, and my proc and CG are at 100% when I cap at 237, it is better if I cap at 200 for my pc and performance?
If you want a more consistent experience, yes, cap at 200 (or your 99% sustainable average framerate). If your cap also prevents max GPU usage, it can prevent more input lag by keeping the pre-rendered frames queue emptied.
joris2a wrote:
03 Jun 2020, 12:02
what do i lose from blocked at 200 fps rather than 240?
What you lose is more frames per second, but if your system can't maintain more than 200 FPS, this will happen with or without a 200 FPS cap anyway.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

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

joris2a
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Re: Monitor GSYNC 240HZ !

Post by joris2a » 04 Jun 2020, 15:02

Ok , mieux vaut GPU et CPU a 80% a 200 fps , plutôt que 100% a 240 fps?

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jorimt
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Re: Monitor GSYNC 240HZ !

Post by jorimt » 04 Jun 2020, 15:19

joris2a wrote:
04 Jun 2020, 15:02
Ok , mieux vaut GPU et CPU a 80% a 200 fps , plutôt que 100% a 240 fps?
Had to translate your post (I don't speak French ;))...
Ok, better 80% GPU and CPU at 200 fps, rather than 100% at 240 fps?
For input lag purposes, yes.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Display: Acer Predator XB271HU OS: Windows 10 Pro 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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