Question / Help Sound Popping, USBPORT.SYS, and my webcam

[llamachomp]

My computer and stream has had some sound crackling, one of my viewers suggested I download LatencyMon to see if a DPC issue is causing the popping, and sure enough, it is. The culprit is USBPORT.SYS. I searched for solutions to this problem, none of them matched my situation, so I started in on some trial and error.

Trial and error results are as such:

Game alone: No popping, USBPORT.SYS behaves itself.
Webcam on in its own software: No popping, USBPORT.SYS peaks around 0.5ms.
OBS open, webcam unchecked first, then preview enabled: No popping, USBPORT.SYS behaves itself.
Turn webcam on in OBS: Popping commences, USBPORT.SYS spikes to around 15ms.
Turn webcam off in OBS: Popping continues. USBPORT.SYS still spikes in the 15ms range.
Turn OBS preview off: Popping stops. USBPORT.SYS drops off the radar.

I assume I can fix this by getting an (expensive!) HDMI camera and running it through my capture card rather than USB, but if there's a free fix, I'd rather use that.

Log file from this test run attached.

 

[R1CH]

Try moving devices to different ports, you're probably overloading a hub. Or lower the webcam resolution.

 

[llamachomp]

Do you mean physically plugging it in to different USB ports? I've now tested in every possible port on my machine, none of them solve the issue.

If I were overloading a hub, wouldn't it overload when using the webcam no matter what software is using it? My problem only starts when OBS loads the camera. No other application causes the latency when using the same webcam.