ROG Strix Scar 16 (2024) – USB-C to DisplayPort Not Working Reliably with External Monitor

[RoB3rT111]

Hi everyone,

I'm using an ASUS ROG Strix Scar 16 (2024) and trying to connect it to my ASUS ROG Swift Pro PG248QP monitor via USB-C to DisplayPort — but the connection is unreliable.

• Most of the time, the monitor stays black and shows "No DisplayPort Signal"

• It only works after reconnecting the cable once I've booted into Windows

• Interestingly, this issue only started appearing late last year, and might be related to BIOS v320

What I’ve tried so far:

• Multiple high-quality USB-C to DisplayPort cables (including VESA-certified)

• An active Club3D USB-C to DisplayPort 1.4 adapter (model CAC-1567)

• Confirmed the PG248QP works fine via direct DisplayPort connections on other systems

Additional system info:

• BIOS: v320

• Latest NVIDIA drivers and firmware installed

• Using the left-side USB-C port (which supports DP 1.4)

• Not using any dock — direct connection only

• Monitor's G-Sync module is enabled, but issue occurs regardless of G-Sync state

• Running Windows 11, fully updated

Is anyone else with a 2024 ROG Strix Scar 16 experiencing similar issues with external monitors over USB-C/DisplayPort?
Any tips or known workarounds would be greatly appreciated — just looking to confirm if this is a wider problem or if I’m missing something.

Thanks in advance!

[Anbby_ROG]

Thank you for providing detailed information. We would like to further confirm a few things with you:

Have you tried using DDU to uninstall the current display drivers and then installed the ASUS-validated NVIDIA graphics driver version V31.0.15.4624 to test if the issue persists?

Additionally, does this issue occur on both the USB 3.2 Gen 2 Type-C port and the Thunderbolt™ 4 port?

If possible, could you kindly record a video demonstrating the issue so we can better understand and analyze the situation? Thank you!