Frustrating USB port... pls help.

My mobo has 4 onboard usb 2.0/1.1 ports and 2 usb 3.0 ports...
It also supports 6 usb 2.0/1.1 via headers...

now the problem is any device connected to these ports works dead slow..
if they are connected to usb 3.0 ports they work fine..

see the transfer rate for a file when i connect the pen drive to 3.0 port.

*img684.imageshack.us/img684/9561/copytest.jpg

transfer rate for the same file when i connect the device to ports other than 3.0...

*img338.imageshack.us/img338/9518/copytest2.jpg

when i connect any usb device to ports other than 3.0 , i get a msg as

*img534.imageshack.us/img534/1913/oiescreenshot12h31m03s.jpg

i tried all ports...
i even dont find any usb 2.0 drivers in gigabyte website for my model..

880GM-USB 3 is my mobo model...