[SOLVED] Is it ok to use usb 2 and usb 3 devices simultaneously on a usb 3 hub?

Ulysses_ · 10-12-2016, 11:05 AM

Is it ok to use usb 2 and usb 3 devices simultaneously on a usb 3 hub? Thought it might slow down the usb 3 devices a little but how much?

jefro · 10-12-2016, 02:37 PM

I get the feeling I had heard something like that before. Maybe usb 1.1 and usb2.

I'd think this is correct as it has stayed there for 4 years. http://superuser.com/questions/47724...-to-2-0-speeds

I guess it is possible that some bad usb 3 hub has some issues. Maybe some odd driver or faulty hardware in system could be an issue.

jpollard · 10-12-2016, 06:08 PM

You can mix them. It is my understanding that what happens is that the USB 2 devices will slow down the transfer - and since that is taking longer it will cause delays for the USB 3 devices to get access to the controller; but the USB 3 devices will transfer data as fast as they and the USB 3 controller can go.

The delay should only occur when the USB 2 devices are doing things.

jefro · 10-12-2016, 06:46 PM

I get the feeling that this is correct. http://superuser.com/questions/27867.../287195#287195

"According to the USB3 specification from here, USB2 functionality on USB3 hosts/hubs does not change. Therefore, (putting power issues aside) USB2 devices still operate with a broadcast method, meaning it will share the same old USB speed bandwidth with all other USB2 devices on the same host/hub. USB2 devices will not have USB3 capacity available to it, as the SuperSpeed USB3 capacity is on different wires that are not connected to USB2 devices."