![]() It turns out that the empty Intel controller belongs to the front panel USB ports, so by connecting the webcam there it would not cause any issues. If a webcam was added, this system would likely experience issues with all the USB devices being on the same controller. You can see that this system has four USB controllers, two from Renesas and two from Intel and that almost all of the devices are connected to a single Intel controller. Synchronization / timing issues (eg video desyncing from audio)Äownload USBView (145 KB) and run it. Video frame drops / corrupted video / low FPS It auto refreshes when a device is added or removed, so you can see exactly which ports on your PC correspond to which USB controller. Microsoft have created a program called USBView which I've modified and posted below which lets you view all your USB controllers and see which devices are connected to which controller. Thankfully it's very easy to fix USB bandwidth issues - simply move your devices to different ports. ![]() The controller has limited bandwidth, so if you put a lot of high bandwidth devices on a single controller, you can experience various bandwidth related issues. Each USB port on your PC is attached to a particular USB controller. While this is fine for most devices, once you start using higher bandwidth devices like webcams, capture cards, microphones or headsets, managing your USB bandwidth becomes important. USB is mostly plug and play - you get your device, put it into a port and you're done (with perhaps a driver install at the end).
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