X670e hero pcie slot 3 causing audio to cut out when being used…

[Krypt]

So I have my asus x670e hero and I’m trying to use a wifi card in the pcie x1 slot on the bottom of the board. If I use it on the second pcie x16 slot then my gpu will only run at x8 as well which I do not want. So my only option is to use the pcie x1 slot on the bottom of the board but everytime I try to turn on the wifi card; it immediately cuts out my audio from my beacn mic. It’s only when the card is in the bottom pcie slot that it does this! But I have to use it so my 4090 continues to get the full x16 bandwidth. I’m having the same exact problems as the guy in this post. 
https://rog-forum.asus.com/t5/gaming-motherboards/asus-x670e-e-amp-pci-e-devices-causing-audio-stati...

unfortunately there was no outcome or solution to the problem in that post so here I am trying to find out what to do. It’s driving me nuts! I have reinstalled all chipset drivers and bios drivers from asus website and everything! Tried a different pcie card and the problem still persist. It only happens when the wifi card is in use. If I deactivate in bios I have no problems but as soon as I turn it back on and get into windows; as soon as it starts to transmit data it cuts out all my Audio and I have to restart pc to regain audio again. This has to be an issue with the board as this post above is having The EXACT issue I am having. Please somebody let me know what to do. I spent all this money on an Asus 4090 and I don’t want to leave it running at x8. My only option is to use the pcie x1 slot. I feel like this was an oversight since many people don’t use the x1 slots anymore. No matter what Gen I set the slot too the audio continues to cut out. 😞 

build:

7950x3d

x670e hero wifi

64gb 6000mhz trident 

asus 4090

asus Thor 1200 psu

I’m so frustrated 😩 

[achugh]

Hi @Krypt , 4090 cards are all GEN4 cards. So when you put this card into PCIe SLOT 1 (also called PEG slot) and set your BIOS to run in X8 + X8 mode so that your WiFi card is using the 2nd PCIEX16 slot, you are not going to lose any performance. You can run some benchmark tests to confirm this information.

While I cannot help you solve your issue, you do have workaround available while others will help you out.

Your PCIe X4 slot is connected to your chipset (X670) and so is the built-in Audio chipset. It seems both these devices are competing for high bandwidth causing issues.

As a non official solution, have you tried to check how your devices are shown using the Messaging Service Interrupt (MSI) Utility? Sometime, enabling the interrupt for Audio can help solve audio issues. You can find this utility in the thread here for unofficial audio drivers for 600/700 series boards thread.

[Jiaszzz_ROG]

Hello, @Krypt 

The PCIEX16_1 and PCIEX16_2 slots share bandwidth, so their channels are split when both are in use, as described on page xii of the ROG CROSSHAIR X670E HERO user manual:

Regarding the PCIEX1 connection to the Wi-Fi card, enabling Wi-Fi causes audio to cut off. 
May I ask if the Wi-Fi card is connected using an extender or adapter, as in the scenario in the other thread?
Which USB Type-C port is the mic connected to (or is it using an extender or adapter) and have you tested other ports to see if the results differ?
In addition to checking Windows updates, drivers, and BIOS updates, have you verified the settings and limitations of the power mode and plan?
If necessary, please consider verifying the issue in Safe Mode.

Thank you.