Hello, Thanks for your reply. Sorry, I made an error with my terminology - full speed = USB1.0, high speed = USB2.0 and super speed = USB3.0. The thing is that If I plug in 4 devices via a hub into one USB2.0 controller all devices must share the bandwidth and power for that entire controller. I've foudn a card which has 4 * USB2.0 controllers but the minimum order quantity is 300 which is a bit steep for me! What I'm looking for is to plug 4 USB2.0 highs speed devices to run at high speed on a USB3.0 super speed hub. Is there a way to do that? Cheers, Neil On Thu, Dec 2, 2010 at 5:03 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 2 Dec 2010, Neil Benn wrote: > >> Hello, >> >> I am looking into plugging a bunch of USB2.0 webcams into a >> USB3 connection. I wanted to connect a USB3.0 hub into a USB3.0 port >> and then connect a few USB2.0 webcams to the USB3.0 hub which will >> then have the bandwidth to connect the cameras at the highest speed of >> USB2.0. >> >> However, I'm not sure if I can connect 4 USB2.0 webcams and then run >> them at high speed down a USB3.0 port via a USB3.0 hub. Basically can >> I connect 4 USB2.0 devices for them to run at full speed into one >> USB3.0 port? > > Better than that, you can connect four USB-2 devices to a USB-3 hub and > have them run at high speed, not just at full speed! > > On the other hand, you don't get any benefit from using the USB-3 > controller and hub when you do this. You might just as well use a > USB-2 controller and/or a USB-2 hub. > > Alan Stern > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html