ASUS ROG Zephyrus G16 2024 USB-C Display Not Working Fix
ASUS ROG Zephyrus G16 2024 · Core Ultra 9 185H · NVIDIA RTX 4090 · Windows 11
Confirm which USB-C port supports DisplayPort Alt Mode
The ROG Zephyrus G16 has multiple USB-C ports but only specific ones support DisplayPort output. Check the ASUS spec sheet or the port markings. The Thunderbolt 4 port (marked with a lightning bolt icon) supports DisplayPort Alt Mode. Standard USB-C data ports do not carry a display signal.
Use a certified Thunderbolt 4 or USB4 cable
Replace your USB-C cable with one certified for Thunderbolt 4 or USB4 (marked with the TB4 logo or USB4 logo). Generic USB-C cables are passive and only carry USB 2.0 signals at the electrical layer, which is insufficient for DisplayPort Alt Mode on the G16.
Update the NVIDIA and Intel display drivers
Download the latest NVIDIA RTX 4090 driver from NVIDIA and the Intel Arc display driver from ASUS Support for the G16 2024. Install both and restart. Display driver version mismatches prevent the Thunderbolt port from negotiating DisplayPort Alt Mode correctly in some driver combinations.
Enable MUX switch in MyASUS
Open MyASUS → Customization and enable the MUX switch to route output through the NVIDIA GPU. On the Zephyrus G16, USB-C display output may require the MUX switch to be active when connecting to monitors that need full GPU bandwidth, such as 4K 144Hz displays.
Update the BIOS
Go to ASUS Support and install the latest BIOS for the ROG Zephyrus G16 2024. ASUS releases BIOS updates that improve Thunderbolt port initialization and USB-C DisplayPort Alt Mode negotiation. This is particularly important for units that shipped with an early production BIOS revision.
Press Win + P to detect the external display
After connecting the USB-C cable, press Win + P and select Extend. Then go to Settings → System → Display and click Detect. Windows sometimes does not auto-detect a USB-C display on first connection and needs to be prompted.
Faizal, Penang: “My 4K monitor showed no signal via USB-C on the Zephyrus G16. Switching to a Thunderbolt 4 certified cable and enabling the MUX switch in MyASUS got it working immediately at full 4K 144Hz.”
Frequently Asked Questions
Does the ASUS ROG Zephyrus G16 2024 support 4K 144Hz via USB-C?
Yes. The Thunderbolt 4 port on the G16 2024 supports DisplayPort 2.0 Alt Mode, which provides enough bandwidth for a 4K 144Hz or 1440p 240Hz external display. Use a certified Thunderbolt 4 cable and enable the MUX switch for best results.
Which GPU drives the USB-C display output on the Zephyrus G16?
It depends on the MUX switch position. In hybrid mode, the Intel Arc iGPU handles the USB-C port. With the MUX switch enabled, the NVIDIA RTX 4090 drives the output directly, which is required for very high resolution or refresh rate monitors.
Can I connect two external monitors to the Zephyrus G16 via USB-C?
Yes, if you use a Thunderbolt 4 hub or dock. The G16 supports daisy-chaining monitors via Thunderbolt when each display is Thunderbolt-compatible. Alternatively, use one USB-C display and one HDMI display simultaneously.
Will a USB-C to DisplayPort adapter work on the Zephyrus G16?
Yes, as long as it is an active adapter that supports DisplayPort Alt Mode and is connected to the Thunderbolt 4 port. Passive adapters that rely on alternate mode negotiation work best with the latest drivers and BIOS installed.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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