Usb hubs


will usb 3.0 hub work ok when plugged usb 2.0 computer? have mid 2012 mac pro desktop running latest os. need @ least 7 ports. have belkin 2.0 7 port hub, every seems drop out, , have reconnect a/c adapter bring online. seems when computer goes sleep no longer powers devices after waking up, till disconnect, , reconnect a/c adapter. weird.
 

nobody?
 


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