Gsync on XL2546K failing

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.
Post Reply
gozza
Posts: 5
Joined: 14 Jul 2021, 10:11

Gsync on XL2546K failing

Post by gozza » 09 Mar 2023, 12:32

i recently noticed that my xl2546k doesnt like gsync anymore.
Whenever i run gsync it shows these artefacts (see video).
Settings are:
gsync on
vsync on
low latency mode on ultra

I know it worked before but i cant get it to work. Already reinstalled a fresh windows, tried different drivers (removed old driver with DDU before). Resetted monitor settings. Even on another PC it shows the same behavior.
Iam afraid that the gsync module of the monitor might be broken.
video_2023-03-09_18-28-05.mp4
(1.61 MiB) Downloaded 102 times

User avatar
jorimt
Posts: 2481
Joined: 04 Nov 2016, 10:44
Location: USA

Re: Gsync on XL2546K failing

Post by jorimt » 09 Mar 2023, 12:41

gozza wrote:
09 Mar 2023, 12:32
Assuming it doesn't occur with G-SYNC off (which would potentially indicate a GPU issue), it indeed looks like an internal panel component has probably failed. How old is the monitor and is it under warranty?
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)

gozza
Posts: 5
Joined: 14 Jul 2021, 10:11

Re: Gsync on XL2546K failing

Post by gozza » 09 Mar 2023, 12:49

Everything okay with gsync off
My invoice is from April 2021. So yeah there is still waranty

User avatar
jorimt
Posts: 2481
Joined: 04 Nov 2016, 10:44
Location: USA

Re: Gsync on XL2546K failing

Post by jorimt » 09 Mar 2023, 13:17

gozza wrote:
09 Mar 2023, 12:49
Everything okay with gsync off
My invoice is from April 2021. So yeah there is still waranty
I'd contact BenQ support then, and show them the same video to get their input, looks faulty. If it's not, they'll probably know better than anyone here.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)

blurryboba
Posts: 5
Joined: 09 Mar 2023, 04:43

Re: Gsync on XL2546K failing

Post by blurryboba » 11 Mar 2023, 04:31

I have same on my xl2540k, it happens when fps lower than 60 or have big spikes, but if fps normal and constant everything good

User avatar
jorimt
Posts: 2481
Joined: 04 Nov 2016, 10:44
Location: USA

Re: Gsync on XL2546K failing

Post by jorimt » 11 Mar 2023, 10:51

blurryboba wrote:
11 Mar 2023, 04:31
I have same on my xl2540k, it happens when fps lower than 60 or have big spikes, but if fps normal and constant everything good
You have the multi-color vertical line pattern on the right side of the screen along with the flicker like the OP does, or just the flicker?

Because while the brightness flicker itself may be normal to a certain extent on some monitor models during VRR operation with very low frame/refresh rates, that pattern is not (assuming it's actually appearing like that for the OP in-person).
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)

blurryboba
Posts: 5
Joined: 09 Mar 2023, 04:43

Re: Gsync on XL2546K failing

Post by blurryboba » 11 Mar 2023, 16:43

jorimt wrote:
11 Mar 2023, 10:51
blurryboba wrote:
11 Mar 2023, 04:31
I have same on my xl2540k, it happens when fps lower than 60 or have big spikes, but if fps normal and constant everything good
You have the multi-color vertical line pattern on the right side of the screen along with the flicker like the OP does, or just the flicker?

Because while the brightness flicker itself may be normal to a certain extent on some monitor models during VRR operation with very low frame/refresh rates, that pattern is not (assuming it's actually appearing like that for the OP in-person).
https://www.youtube.com/watch?v=_Nf3x1UsyMg
https://www.youtube.com/watch?v=sFHxIKZ ... e=youtu.be

User avatar
jorimt
Posts: 2481
Joined: 04 Nov 2016, 10:44
Location: USA

Re: Gsync on XL2546K failing

Post by jorimt » 11 Mar 2023, 18:02

gozza wrote:
09 Mar 2023, 12:32
Iam afraid that the gsync module of the monitor might be broken.
blurryboba wrote:
11 Mar 2023, 16:43
I should have checked the model number earlier. I just assumed it was native G-SYNC because the OP mentioned it had a module.

The XL2546K is not officially G-SYNC Compatible, nor does it have a G-SYNC module. It's a FreeSync-capable display (aka software-level VRR only) with unofficial G-SYNC Compatible support when DyAc is disabled and Adaptive-Sync/FreeSync Premium is enabled in the monitor OSD:
https://zowie.benq.com/en-us/support/fa ... 00001.html

As such, a lack of visual glitches, such as screen flicker and blanking during VRR operation are not guaranteed, and some behavior can indeed be dependent on GPU driver versions, and/or whether your using an AMD or Nvidia GPU.

From what both of your videos are showing, it looks like LFC is either kicking in too late, or not at all whenever the framerate plummets (including any momentary frametime spikes), causing the display to flicker and/or blank whenever it drops out of the VRR range at the low end.

The only thing I can suggest is to use CRU to try and manually raise the minimum LFC range to better avoid the issue, assuming this model supports LFC at all (according to the RTINGs review, it seems to: https://www.rtings.com/monitor/reviews/ ... ie-xl2546k).
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series

Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)

User avatar
Chief Blur Buster
Site Admin
Posts: 11647
Joined: 05 Dec 2013, 15:44
Location: Toronto / Hamilton, Ontario, Canada
Contact:

Re: Gsync on XL2546K failing

Post by Chief Blur Buster » 12 Mar 2023, 04:23

FreeSync LFC in NVIDIA drivers is not as good as FreeSync LFC in AMD drivers.

In quality of LFC style algorithms it usually goes from:

NVIDIA G-SYNC Native's "LFC" (best)
AMD FreeSync LFC (middling)
NVIDIA G-SYNC Compatible's "LFC" (worst)

It is not a hard-and-fast rule. In Native, it's monitor-side LFC automatically occuring, while in FreeSync, LFC is software initiated in the drivers.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

Image
Forum Rules wrote:  1. Rule #1: Be Nice. This is published forum rule #1. Even To Newbies & People You Disagree With!
  2. Please report rule violations If you see a post that violates forum rules, then report the post.
  3. ALWAYS respect indie testers here. See how indies are bootstrapping Blur Busters research!

Post Reply