Dear Forum and dear @Aureliannn_ROG
Hello ASUS Community and Support Team,
I’m experiencing an issue with my ASUS ROG Swift OLED PG32UCDP that seems related to a problem reported in a previous thread (now closed due to inactivity). I’m hoping to revive the discussion and get some insights or a potential fix, as this issue persists and appears to affect the simulated display modes.
Setup:
Monitor: ASUS ROG Swift OLED PG32UCDP
GPU: NVIDIA RTX 3080
Cable: Original DisplayPort cable included with the monitor
Drivers: Latest NVIDIA drivers (clean install, version 555.x or higher)
Firmware: Latest monitor firmware (MCM 106)
OS: Windows 11 (latest build)
Issue: In the full 32-inch mode at 1080p@480Hz, everything works perfectly—the NVIDIA Control Panel and Windows correctly report the native resolution as 1920x1080. However, when I switch to the 24.5-inch simulated mode or 27-inch simulated mode, the native resolution is incorrectly reported as 1496x848 (24.5-inch) or 1648x928 (27-inch). This also causes text to appear pixelated and blurry, especially at 480Hz, while 4K@240Hz in 32-inch mode looks sharp.
Observations:
The pixelation seems partly due to the lower pixel density of 1080p (90 PPI in 24.5-inch mode, ~82 PPI in 27-inch mode) compared to 4K (138 PPI), but the incorrect resolution detection likely worsens it by introducing scaling artifacts.
I suspect an EDID issue in the simulated modes, where the monitor sends incorrect resolution data to Windows/NVIDIA.
Manual Reference: I checked the official PG32UCDP manual, and under the 16:9 (24.5" Simulation) aspect control timings for 480Hz, I noticed that the resolution 1496x848@480Hz is listed directly below the expected 1920x1080@480Hz. This is strange and might indicate that the monitor is incorrectly reporting this lower resolution as native in the simulated mode.
Troubleshooting Done:
Manually set the resolution to 1920x1080@480Hz in NVIDIA Control Panel and Windows, with scaling at 100%.
Optimized ClearType for text rendering.
Confirmed the latest NVIDIA drivers and monitor firmware (MCM 106).
Tested with the original DisplayPort cable.
Checked OSD settings (no changes to DSC or image modes that resolve the issue).
Despite these efforts, the incorrect native resolutions (1496x848 for 24.5-inch, 1648x928 for 27-inch) persist in the simulated modes, and text remains blurry at 480Hz. The 32-inch mode at 1080p@480Hz works fine, so this seems specific to the simulated modes.
Questions:
Has anyone else encountered these incorrect native resolutions (1496x848 or 1648x928) in the 24.5-inch or 27-inch simulated modes on the PG32UCDP?
Is the mention of 1496x848@480Hz in the manual a typo, or does it indicate a deliberate EDID setting for the simulated mode? If so, why does it cause pixelation?
Are there known firmware updates beyond MCM 106 that address EDID issues in the simulated modes?
Has anyone successfully fixed this using tools like CRU (Custom Resolution Utility) to correct the EDID data?
I’d appreciate any insights from the community or ASUS support. This feels like a firmware or EDID issue, especially since the manual lists the “wrong” resolution. I’m considering using CRU to force 1920x1080@480Hz in the simulated modes but would prefer an official fix. Thanks in advance for your help!
