NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
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brownvim
- Posts: 227
- Joined: 22 Jun 2020, 04:15
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
I have taken pursuit photos at Pulse Widths 10, 20, 30 and 40 at 1920, 3840 is difficult with an iPhone, ill post them later when I'm back at the PC.
I think I took them right, 1/30 shutter, 120fps video, followed the screen so sync lines were straight.
I think I took them right, 1/30 shutter, 120fps video, followed the screen so sync lines were straight.
Last edited by brownvim on 02 Jul 2026, 17:15, edited 1 time in total.
5800X3D, RTX 5080 FE, OLED AW3423DW + Acer Pulsar XB273U F5
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brownvim
- Posts: 227
- Joined: 22 Jun 2020, 04:15
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
This help? 1920 pixels per second, PW100, 120hz.
https://youtu.be/WcBL8boY_mQ
crosstalk is minimal, even harder to see at lower pulse widths.
5800X3D, RTX 5080 FE, OLED AW3423DW + Acer Pulsar XB273U F5
- kyube
- Posts: 931
- Joined: 29 Jan 2018, 12:03
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Could you test the same PW's in intermediary speeds up till 3840px/s?brownvim wrote: ↑02 Jul 2026, 09:02I have taken pursuit photos at Pulse Widths 10, 20, 30, 40 and 50 at 1920, 3840 is difficult with an iPhone, ill post them later when I'm back at the PC.
I think I took them right, 1/30 shutter, 120fps video, followed the screen so sync lines were straight.
PW 10 to 40.jpg
For example:
https://testufo.com/ghosting#pps=2400
https://testufo.com/ghosting#pps=2880
https://testufo.com/ghosting#pps=3000
Judging from the pursuit photographs you've done, the eye-tracked motion clarity does indeed look lovely.
One of the few good 120Hz strobing implementations on a 1440p image resolution.
Dare I say it rivals CRTs in terms of effective motion clarity, without it's detriments.
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brownvim
- Posts: 227
- Joined: 22 Jun 2020, 04:15
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Maybe some other time as it’s not easy with an iPhone, no promises. I want to play games on it right now!kyube wrote: ↑02 Jul 2026, 12:35Could you test the same PW's in intermediary speeds up till 3840px/s?brownvim wrote: ↑02 Jul 2026, 09:02I have taken pursuit photos at Pulse Widths 10, 20, 30, 40 and 50 at 1920, 3840 is difficult with an iPhone, ill post them later when I'm back at the PC.
I think I took them right, 1/30 shutter, 120fps video, followed the screen so sync lines were straight.
PW 10 to 40.jpg
For example:
https://testufo.com/ghosting#pps=2400
https://testufo.com/ghosting#pps=2880
https://testufo.com/ghosting#pps=3000
Judging from the pursuit photographs you've done, the eye-tracked motion clarity does indeed look lovely.
One of the few good 120Hz strobing implementations on a 1440p image resolution.
Dare I say it rivals CRTs in terms of effective motion clarity, without it's detriments.
5800X3D, RTX 5080 FE, OLED AW3423DW + Acer Pulsar XB273U F5
- ManuelG_NVIDIA
- Posts: 37
- Joined: 27 Jan 2014, 14:46
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Could you provide additional details on how you are reproducing this issue?
- When the issue occurs, does only the display enter sleep mode, or does the entire PC also go to sleep?
- Are any additional monitors connected to your RTX 4080?
- Have you changed any NVIDIA Control Panel or NVIDIA App settings from their default values that could affect display behavior (for example, custom color settings, power management, or other display-related settings)?
- Do you power off the monitor when not in use, or do you leave it in sleep mode?
- Approximately how long does the display need to remain in sleep mode before the issue can be reproduced after waking it?
- Are you currently using the latest NVIDIA driver (610.62)?
- Are there any other steps or conditions that consistently help reproduce the issue?
Please send me a PM if I fail to keep up on replying in any specific thread.
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Katzenwerfer_MX
- Posts: 15
- Joined: 05 Jul 2025, 02:26
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
If we are to trust their word, it's because of unacceptable crosstalk, as it has been mentioned before in the thread.
At 60 and 120 Hz, Global Flash can look real good without much double image. FW 1.1.7 will show that for ULMB 120. But at 240 and especially 360 Global Flash would have significant double image.
- rexbinary
- Posts: 12
- Joined: 21 Jan 2026, 00:55
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Hi Manuel,ManuelG_NVIDIA wrote: ↑02 Jul 2026, 13:35Could you provide additional details on how you are reproducing this issue?
- When the issue occurs, does only the display enter sleep mode, or does the entire PC also go to sleep?
- Are any additional monitors connected to your RTX 4080?
- Have you changed any NVIDIA Control Panel or NVIDIA App settings from their default values that could affect display behavior (for example, custom color settings, power management, or other display-related settings)?
- Do you power off the monitor when not in use, or do you leave it in sleep mode?
- Approximately how long does the display need to remain in sleep mode before the issue can be reproduced after waking it?
- Are you currently using the latest NVIDIA driver (610.62)?
- Are there any other steps or conditions that consistently help reproduce the issue?
Sure.
- The PC itself is set to never sleep or hibernate. The issue occurs after the monitor(s) have slept and been woken up.
- I have another DisplayPort 1080p monitor in portrait mode 60Hz, and a HDMI 4K TV 60Hz attached.
- All the Nvidia app settings are default. I have tested with Power set to both Normal and Maximum Performance.
I never power off the monitors or the PC. Only the monitors sleep after 25 minutes idle.
- You can sleep the monitor to the point that the screen is completely black, immediately wake it, and the issue will occur. So, it needs zero time. Also, if you don't launch a game for hours the issue will still occur until the monitor has been power cycled.
- I am using 610.62 driver.
- The monitor needs to be set to 360Hz on the Windows desktop. The games I have, Battlefield 6 specifically, need to be set for full screen exclusive 360Hz. After the monitor sleeps, you wake it and launch the game you receive a black screen with a horizontal band of light that flashes periodically towards the bottom of the screen. After you power off the monitor using the power button on the monitor and then power it back up, you can launch the game without issue. If you set the desktop to 240Hz and leave the game full screen exclusive at 360Hz, the issue will not occur after monitor sleep. This is the workaround I am using.
EDIT: I seldom post without an edit.
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t2na
- Posts: 34
- Joined: 18 Aug 2022, 13:48
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Finished the 1.1.8 update and had an hour or so playing the Finals on PS5 Pro (120hz pretty much always locked) - and wow, the 120hz mode is incredible. Completely surprised me with how crystal clear it all is. I need to try some more games at it to get a proper feel for it but the first impressions are fantastic.
Great to see the reduced input lag at 240hz as well, I mainly keep my Pulsar monitor at 360hz but cap all my games to 240fps as I've found the clarity from 240-360 isn't a huge increase - but the GPU utilisation and temperatures saved are much more noticeable to me.
Really great to see the continued Pulsar support from Nvidia, the NV App per game 'setting' (ULMB2 vs. Pulsar etc.) is the one I'm really looking forward to. I often toggle Pulsar on and off via the OSD mainly just to stop the monitor feeling so hot when I'm not actually using it for games!
Great to see the reduced input lag at 240hz as well, I mainly keep my Pulsar monitor at 360hz but cap all my games to 240fps as I've found the clarity from 240-360 isn't a huge increase - but the GPU utilisation and temperatures saved are much more noticeable to me.
Really great to see the continued Pulsar support from Nvidia, the NV App per game 'setting' (ULMB2 vs. Pulsar etc.) is the one I'm really looking forward to. I often toggle Pulsar on and off via the OSD mainly just to stop the monitor feeling so hot when I'm not actually using it for games!
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phazers
- Posts: 1
- Joined: 01 Jul 2026, 11:52
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
Hi
Installed 1.1.8
How do I enable the 120 hz ULMB2 mode? I see the ULMB 60 hz option under "G-Sync Processor" When I use the tumbstick to enter the Asus monitor utility.
Want to try out some Switch 2 120 fps demo's see if I can enable it, but no clue how to???
Thanks in advance.
Installed 1.1.8
How do I enable the 120 hz ULMB2 mode? I see the ULMB 60 hz option under "G-Sync Processor" When I use the tumbstick to enter the Asus monitor utility.
Want to try out some Switch 2 120 fps demo's see if I can enable it, but no clue how to???
Thanks in advance.
- CriticalHit_NL
- Posts: 19
- Joined: 22 Apr 2026, 16:34
Re: NVIDIA G-Sync Pulsar monitor - Asus ROG Strix XG27AQNGV
I just updated to the 1.1.8 firmware, thanks for the continued support Nvidia.

Firmware 1.1.6 seemed to work really well for me on the RTX 5090 thus far, all the way up to the newest 610.62 so far under Windows 10 22H2 x64
The only two things I had noticed on 1.1.6 was:
1. Random very bright white flash (maybe microstutter/frametime spike related?) I think I've seen it occasionally on some other games but it was so very sporadic that you don't think much of it and move on.
Post: viewtopic.php?t=15149&start=1030#p125264
2. The weird image retention issue by running https://testufo.com/ghosting for a minute and then close it.
Post: viewtopic.php?p=125300#p125300
I don't really know enough to say what this could be caused by.
Point 2 above is still happening on firmware 1.1.8
Is this a limitation of the display tech (IPS?) or is this a bug that could actually be solved?

Firmware 1.1.6 seemed to work really well for me on the RTX 5090 thus far, all the way up to the newest 610.62 so far under Windows 10 22H2 x64
The only two things I had noticed on 1.1.6 was:
1. Random very bright white flash (maybe microstutter/frametime spike related?) I think I've seen it occasionally on some other games but it was so very sporadic that you don't think much of it and move on.
Post: viewtopic.php?t=15149&start=1030#p125264
2. The weird image retention issue by running https://testufo.com/ghosting for a minute and then close it.
Post: viewtopic.php?p=125300#p125300
I don't really know enough to say what this could be caused by.
Point 2 above is still happening on firmware 1.1.8
Is this a limitation of the display tech (IPS?) or is this a bug that could actually be solved?
Main System:
i9 13900K @ 0.06v undervolt 0x10B microcode / 128GB (4x32GB) Corsair Dominator Platinum RGB DDR5-5400 CL40 XMP / Asus ROG Maximus Z790 Extreme (early 0219 bios, Sept 2022) / Asus ROG Astral RTX 5090 OC / 2x 990 Pro 4TB / 3x WDC Ultrastar HC590 DC 24TB / 3x HGST He10 Ultrastar 8TB / 1x HGST 7K4000 Deskstar 4TB / Corsair iCUE H170i Elite Capellix LCD 420mm AIO (6x Noctua NF-A14 IndustrialPPC 3000RPM) / Corsair AX1600i PSU (2025) / CoolerMaster HAF 700 EVO / Asus ROG Strix Pulsar XG27AQNGV 1440P 360Hz / Asus ROG Swift PG279Q 1440P 165Hz / BenQ BL2411PT 1200P 60Hz
Secondary System:
i7 3930K @ 4.8Ghz 1.4v / 32GB (8x4GB) Corsair Dominator DDR3-1866 CL9 XMP 1T / Asus Sabertooth X79 (2012 bios 3102) / EVGA GTX1080Ti FTW3 / 1x 840 Pro 256GB / 1x 860 Pro 2TB / 2x HGST 7K4000 Deskstar 4TB / Corsair iCUE H115i RGB Elite 280mm AIO (stock fans in pull) / Corsair AX1200i PSU (2014) / CoolerMaster HAF XM
Third System:
i7 950 @ 3.2Ghz turbo / 24GB (6x4GB) Corsair Dominator/Vengeance DDR3-1600 CL9 XMP / Asus P6T Deluxe V1 X58 / Asus ProArt RTX 4060 8GB / 1x 840 Pro 256GB / 1x WD Blue 1TB / Corsair HX750i PSU / CoolerMaster V6-GT CPU-cooler / CoolerMaster HAF 922
Fourth System:
Core 2 Quad Q9550 @ 2.91Ghz / 8GB (2x4GB) DDR3-1066 @ 1098 Royemai (SK-Hynix) / Gigabyte GA-G41M-Combo (Rev. 2.0) @ 343 FSB / EVGA GTX 560 SuperClocked 1GB / 1x860 EVO 500GB / 1x Samsung HD502HI 500GB / Artic Freezer 7 Pro Rev 2.0 / Corsair HX750i PSU / CoolerMaster Elite 331
i9 13900K @ 0.06v undervolt 0x10B microcode / 128GB (4x32GB) Corsair Dominator Platinum RGB DDR5-5400 CL40 XMP / Asus ROG Maximus Z790 Extreme (early 0219 bios, Sept 2022) / Asus ROG Astral RTX 5090 OC / 2x 990 Pro 4TB / 3x WDC Ultrastar HC590 DC 24TB / 3x HGST He10 Ultrastar 8TB / 1x HGST 7K4000 Deskstar 4TB / Corsair iCUE H170i Elite Capellix LCD 420mm AIO (6x Noctua NF-A14 IndustrialPPC 3000RPM) / Corsair AX1600i PSU (2025) / CoolerMaster HAF 700 EVO / Asus ROG Strix Pulsar XG27AQNGV 1440P 360Hz / Asus ROG Swift PG279Q 1440P 165Hz / BenQ BL2411PT 1200P 60Hz
Secondary System:
i7 3930K @ 4.8Ghz 1.4v / 32GB (8x4GB) Corsair Dominator DDR3-1866 CL9 XMP 1T / Asus Sabertooth X79 (2012 bios 3102) / EVGA GTX1080Ti FTW3 / 1x 840 Pro 256GB / 1x 860 Pro 2TB / 2x HGST 7K4000 Deskstar 4TB / Corsair iCUE H115i RGB Elite 280mm AIO (stock fans in pull) / Corsair AX1200i PSU (2014) / CoolerMaster HAF XM
Third System:
i7 950 @ 3.2Ghz turbo / 24GB (6x4GB) Corsair Dominator/Vengeance DDR3-1600 CL9 XMP / Asus P6T Deluxe V1 X58 / Asus ProArt RTX 4060 8GB / 1x 840 Pro 256GB / 1x WD Blue 1TB / Corsair HX750i PSU / CoolerMaster V6-GT CPU-cooler / CoolerMaster HAF 922
Fourth System:
Core 2 Quad Q9550 @ 2.91Ghz / 8GB (2x4GB) DDR3-1066 @ 1098 Royemai (SK-Hynix) / Gigabyte GA-G41M-Combo (Rev. 2.0) @ 343 FSB / EVGA GTX 560 SuperClocked 1GB / 1x860 EVO 500GB / 1x Samsung HD502HI 500GB / Artic Freezer 7 Pro Rev 2.0 / Corsair HX750i PSU / CoolerMaster Elite 331
