I'm using a usb3 hub with no issues, I have 10 2pacs on it at 200mhz.
really?? Lucky you. I remember something about Intel USB3.0 drivers or was it VIA drivers that doesnt really gel well with the 2pacs. i am going to try and find the forum post after work.
Here is my USB 3.0 hub:
This is the post that i was referring to. i guess using a USB 3.0 Hub is a different story
https://bitcointalksearch.org/topic/m.18979012
I had read thru some of these pages as well but if you continue a few more pages philipma1957 had used a USB 3 hub and it worked, I think he also started a thread on what hub to use. The USB 3 hub was not cheap but I didn't mind investing some of my coins, same goes for the sticks they don't make much but I like to tinker and its more of a hobby to have them.
here is one of his post with the USB 3 hub: https://bitcointalk.org/index.php?topic=1764803.420