[Motherboard] [ThunderboltEX 3] Troubleshooting for PCIE WIFI expansion card installed on Thunderbolt-ready motherboards

When you connect a PCIE WIFI expansion card to a Z490 motherboard equipped with either onboard Thunderbolt or a ThunderboltEX 3 card and encounter wireless connectivity problems, it is very likely due to a known compatibility issue between PCIE ASPM and some models of WIFI card themselves. Please follow the following procedures to solve this technical issue:

Affected models:

ProArt Z490-CREATOR 10G

PRIME Z490-A

ROG / ROG STRIX Z490 series motherboard

Please follow the following procedures to solve this technical issue:

1. Restart your computer.

2. When the system reboots, press DEL or F2 to enter into BIOS setting.

3. Press F7 to enter advanced mode.

4. Click [Platform Misc Confiuration]- [L1 Substates], then please select [L1 Substates] as [Disabled].

 5. Please set [L1 Substates] as [Disabled].

5. Press F10 (which means Save Changes & Reset), then select OK to validate your setting.

After reboot, please check if wireless connectivity gets back on track.

If the problem still cannot be fixed, please contact ASUS Product Support.

Notice

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