Asus VG259Q and stutter with LFC
Posted: 11 Jun 2021, 03:26
Hi. Recently bought an Asus VG259Q, my first Freesync monitor so I'm a bit new when it comes to the VRR stuff. It's connected to my GTX 1060 3GB with DP cable. As far as I've understood the monitor is G-SYNC compatible so it should work pretty well. I'm running the latest Nvidia driver (the one that came out a day before writing this topic). Using Windows 10 2004. I'm running the G-sync compability "for fullscreen and windowed applications" since some of my games don't have exclusive fullscreen modes and it seems like fewer and fewer games have those as time goes on.
VRR works great with this display - as long as i run games at over 72Hz. You see the moment I drop down to say, 60fps, LFC kicks in and ups the screen refresh rate to 120Hz. And that's when I start getting pretty severe stuttering.
The thing is, it doesn't matter whether I run VRR with LFC or try to view a 60fps video using a static 120Hz mode, I WILL get heavy stuttering. All the stutters at 60fps go away when I drop the monitor refresh rate to 60. So basically whenever the fps/Hz ratio is 1/2, I get stuttering which does not show up on Rivatuner. If I cap a game's refresh rate to 60 (or 58 for example), Rivatuner shows a flat frame-time graph, yet the screen stutters when the refresh rate is double of the fps (on VRR mode the OSD fps meter also bounces back and forth between, say 100 and 140Hz).
What really makes me suspect the monitor really is a problem here is the fact if I boot into MacOS (the machine is a hackintosh), when the screen is connected to my motherboard with HDMI and powered via iGPU and I put the screen in 120Hz (VRR naturally doesn't work), I get the same exact stuttering prroblem when viewing 60fps videos. If I switch to 60Hz mode, the stuttering goes away.
So first of all: is LFC suppose to break your frame-pacing? Isn't LFC suppose to kick in at 48fps and not higher? Are you not supposed to be able to view 60, 30 and 24fps content with even frame-pacing on 120Hz screen refresh? Or does this monitor seems busted to you and I should return it (still have about 20 days left).
Secondly: Is there a way for me to disable LFC for the monitor in some way and test how the VRR works if I run with 1:1 ratio for all framerate ranges?
I'm aware of the Nvidia 10-series bug with LFC which gets fixed with cycling 144 and 120Hz back and forth.
I've tried various settings in NVCP, including all Vsync options, different frame-rate limits (I've yet to test say, 69 vs 75fps on a game that supports high refresh rates to see where exactly does LFC kick in).
Any insight into this is greatly appreciated. Thanks in advance!
VRR works great with this display - as long as i run games at over 72Hz. You see the moment I drop down to say, 60fps, LFC kicks in and ups the screen refresh rate to 120Hz. And that's when I start getting pretty severe stuttering.
The thing is, it doesn't matter whether I run VRR with LFC or try to view a 60fps video using a static 120Hz mode, I WILL get heavy stuttering. All the stutters at 60fps go away when I drop the monitor refresh rate to 60. So basically whenever the fps/Hz ratio is 1/2, I get stuttering which does not show up on Rivatuner. If I cap a game's refresh rate to 60 (or 58 for example), Rivatuner shows a flat frame-time graph, yet the screen stutters when the refresh rate is double of the fps (on VRR mode the OSD fps meter also bounces back and forth between, say 100 and 140Hz).
What really makes me suspect the monitor really is a problem here is the fact if I boot into MacOS (the machine is a hackintosh), when the screen is connected to my motherboard with HDMI and powered via iGPU and I put the screen in 120Hz (VRR naturally doesn't work), I get the same exact stuttering prroblem when viewing 60fps videos. If I switch to 60Hz mode, the stuttering goes away.
So first of all: is LFC suppose to break your frame-pacing? Isn't LFC suppose to kick in at 48fps and not higher? Are you not supposed to be able to view 60, 30 and 24fps content with even frame-pacing on 120Hz screen refresh? Or does this monitor seems busted to you and I should return it (still have about 20 days left).
Secondly: Is there a way for me to disable LFC for the monitor in some way and test how the VRR works if I run with 1:1 ratio for all framerate ranges?
I'm aware of the Nvidia 10-series bug with LFC which gets fixed with cycling 144 and 120Hz back and forth.
I've tried various settings in NVCP, including all Vsync options, different frame-rate limits (I've yet to test say, 69 vs 75fps on a game that supports high refresh rates to see where exactly does LFC kick in).
Any insight into this is greatly appreciated. Thanks in advance!