I'm setting up a monitor wall with 12 screens, using 1 AMD HD 4350 (dual DVI), 1 AMD 2350 (one DVI and one VGA) and eight USB-to-VGA adapters, with 4 of them hooked up to a self-powered USB 3.0 Hub. I managed to get up to 10 screens working at the same time, but no matter what happens I wasn't able to get the last 2 working. Apparently all of the USB converters are working.

The Machine is running the GPUs mentioned above, with a Core 2 Duo E7500 @ 2.9GHz on 4 GB of RAM. The USB adapter is called "UGA USB Display Adapter".

Any help is appreciated.

  • What happens when you connect 11th monitor? Have you checked how many monitors work when only one is connected to GPUs?
    – gronostaj
    Jul 14, 2015 at 21:25
  • It happens nothing when i connect the 11th monitor. The number of monitors connected to GPUs does not influence the number of monitors recognized. Having anywhere from 0 to 4 makes no difference in the USB connections.
    – Pedro
    Jul 14, 2015 at 21:29
  • Have you tested if all USB can be connected at the same time, and 2 of the other screens not, and if that works? You'll have to figure out if its a limitation of having that many through USB (for example a problem with the hub) or that windows somehow does not understand more than 10 screens.
    – LPChip
    Jul 14, 2015 at 21:43
  • So you can't connect more than 6 monitors through USB, no matter how many are connected to GPUs? What's the resolution of screens and their refresh rate?
    – gronostaj
    Jul 14, 2015 at 22:19

1 Answer 1


The limit of six USB-connected monitors is imposed by the USB Adapters you're using.

How many USB monitors can be supported by a single PC?

Up to 6 USB displays are supported on a PC, and up to 4 displays on a Mac. Under Windows Multipoint Server, up to 14 USB clients are supported.


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