The Aorus X870 Elite WiFi 7 stops sending data when any device is attached to the rear USB-C port.
The Aorus X870 Elite WiFi 7 stops sending data when any device is attached to the rear USB-C port.
Everything functions smoothly except when connecting anything to the rear USB-C port, the motherboard refuses to display any logo or information. It doesn’t matter whether it’s my microphone or headphone amplifier—anything works if I use an adapter and connect via USB-A after booting. Any advice? The idle time is 08, and Gigabyte Control Center shows no updates for BIOS or drivers. PC games run well and pass all stress tests I’ve performed, including OCT and various benchmarks. There have been no crashes even before installing drivers, so it seems the system is stable. I believe it’s not a short circuit. I’ve managed all cables properly, and only three loose connections on the fan daisy chain were secured with tape or zip ties. I’m pretty sure it’s not a short, and I’ve confirmed both the case and motherboard fitment.
Delay might be the problem. It's configured for 10 seconds by default, but USB4 doesn't show any display settings in the BIOS. The PCIe and other codes are present, but the MOBI code is now A0.
The initial screen output in the BIOS isn’t set to PCIE. I think you’ve already waited about ten seconds. Another choice appears: USB support. It indicates that with fast boot enabled, you can adjust settings and it might be useful to try a partial initial setup. However, it doesn’t clarify which USB components are turned off, so it could block your mouse or keyboard needed for BIOS access, which would be an issue.
I still have plenty of USB-A ports that work fine. It seems Gigabyte didn’t plan for you to use the rear USB-C for permanent devices—maybe they were just there for PD, DP, and fast thumb drives. Also, USB-C is prone to damage from accidental bumps or shaking, so keeping things connected might be risky.
I upgraded to the latest version F10, but the problem with USB hotplug remains unresolved. The BIOS still doesn’t show any new settings, yet the CPU temperature display is now showing live values. The symptoms are consistent—only the rear USB-C port works during boot, and it powers on after a full shutdown. I also noticed the microphone stays active even after a complete power cycle, suggesting it might not be designed for long-term use beyond powering on, PD, DP, and data. It seems the motherboard and power delivery unit likely struggle with the rear USB-C when peripherals are connected, potentially stressing the board.
It seems you're considering a few options. You might have already handled the issue without using any money. There could be unusual behavior with the PSU, but testing it further might not be worth it since it only checks the reported voltages in HWInfo/Monitor against the ATX power limits.