Solved USB port speed vs. root hub speed Tags: Storage Speed USB Root Last response: August 1, 2013 4:59 PM in Storage Share Jgor August 1, 2013 3:07:25 PM I have a Dell Inspiron 1545 with 3 USB 2.0 ports. However, Device Manager shows 8 USB root hubs, 4 of which are full-speed (1.0) and 4 are high-speed (actual 2.0). How can I determine which ports actually run at 2.0 high speed? More about : usb port speed root hub speed Best solution Dereck47 a c 536 G Storage August 1, 2013 4:59:56 PM USB 1.0 (Full-Speed) bandwidth speeds are up to 12Mbit/s. 12Mb/s equals 1.5MB/s. USB 2.0 (High-Speed) bandwidth speeds are up to 280Mbit/s. 280Mb/s equals 35MB/s. Connect a thumb drive or an external HDD to a USB port and test Read/Write speeds with ATTO benchmark software. If your Read/Write speeds are greater than 1.5MB/s then you know it's a USB 2.0 port. Repeat the test on all USB ports. Share Can't find your answer ? Ask ! Publish Related resources Hi Speed USB 2.0 4 Port HUB Forum SolvedWill i get improved speeds plugging in a usb 2.0 hub into a 3.0 port. Forum Usb root hub 8 ports Forum Speed of bi-directional parallel port vs usb port Forum Speed of USB vs. Paralell Port Scanners? Forum HI-SPEED USB Device Plugged into non-HI-SPEED USB Hub. A HI-SPEED USB device Forum Hi speed multi usb hub 2 0 driver download for windows xp Forum SolvedUSB 2 and USB 3 Transfer At the Same Speed on My USB 3 Port? Forum What is a Hi-Speed USB Device attached to non Hi-Speed hub Forum 3.0 USB flash drive speed on USB 2.0 port Forum Hi-Speed USB Device Attached to non-Hi-Speed Hub? Forum USB 2 HUB not recognized as hi-speed Forum High Speed USB Hub Forum Hi-speed USB device plugged into non-hi-speed USB hub Forum no-high speed USB HUB Forum how do i unistall USB 3 Root hub Forum SolvedUsb 2.0 root hub drivers? Forum Measuring the speed of USB 3.0 port Forum USB Root Hub Device Failed Forum Q - waves - problem with usb root hub , reciever not working properly Forum More resources Read discussions in other Storage categories Hard Drives DVD Drives DVD Writers Optical Media Flash Media NAS/RAID SSD Western Digital !