posted as a comment on this YouTube vid:

Did you know that Windows 10 has a ceiling on how many resources it can assign to USB devices? Beyond that, you can’t plug more USB devices, even using hubs. Also, bandwidth-intensive devices will clog up your USB hub, making the other devices “stutter”, which you can see if they are input devices like a wireless mouse. It’s about 96? or so resources (addresses? I don’t understand it very well), but some devices take up more than 1. And this includes hubs – USB hubs also take up the resource. I reached that limit.

Computer with 9 USB ports connects to:

  • USB Hub1 30 feet away
  • USB Hub2 (3.0) 10 feet away
  • Webcam1, C930e 80 feet away (via cable extension)
  • Webcam2, C920 30 feet away (via cable extension)
  • Audio Interface
  • HDMI Capture Card
  • Mic1
  • USB Hub3 50 feet away
  • Webcam4, C920

PCIe USB 3.0 Expansion Card with 4 Ports connects to:

  • Webcam5, nobrand
  • Webcam6, nobrand
  • Webcam7, nobrand
  • Intuos Tablet

USB Hub1 (2.0, 7 ports) connects to:

  • Printer
  • Document Scanner
  • Wireless Keyboard1 Receiver

USB Hub2 (3.0, 10 ports) connects to:

  • Touchpad
  • Wireless Keyboard2 Receiver
  • Wireless Mouse1 Receiver
  • Wireless Mouse2 Receiver
  • Presentation Clicker Receiver

USB Hub3 (actually it’s just a splitter with 4 ports.. not sure if there is a difference with larger hubs) connect to:

  • Webcam3, C270 30 feet away (via cable extension)
  • Numpad

I’m left handed and use vertical mouse, which makes it impossible to find single wireless receiver keyboard+mouse combo that includes a left-handed vertical mouse.

It seems that devices that connect via Bluetooth do not take up the USB resource – but I haven’t tested thoroughly yet. After hitting the limit on Windows and reading up on it and realizing that there is a hard limit, I’m trying to move some of the devices to Bluetooth (since they can do either a BT or a IR connection)

Bluetooth devices:

  • Headset1
  • Headset2
  • Xbox Controller
  • Potentially: Touchpad, Clicker, Tablet