How can I increase the maximum number of USB devices that can be connected at one time in Windows 7?

I have a Windows 7 machine in which I want to connect 32 devices which just dump logs out. But my machine doesn't allow me to connect more than 14 devices, at which point when I plug in any more it fails to recognize them. Is there a way to increase this maximum number? Do I need to add an additional USB controller?

Machine Configuration:

• ThinkStation E31
• 4 USB 3.0 ports, 6 USB 2.0 ports

One can connect up to 127 devices, including the hub devices, to a single USB host controller. I do not believe there is any limit to the number of USB host controllers, other than physical space and power limitations.

In your case, it sounds like a lack of power. Although 14 devices doesnt sound like much, they are probably drawing to much power and the 15th device is the "straw that broke the camel's back."

Try using powered USB hubs.