Helloo! 
I have Asus M4N78 SE.
I recently bought a USB 2.0 external case for 3,5" hard disk.
I connected to this mobo, I tried all 12 usb ports but the transfer speed is always... 1MB/s
I tried the device to different a pc and speed was ok.
I also tried another usb device(a stick) to m4n78 se and speed seemed to be ok.
So...
do you have any idea why the speed is just 1MB/sec?
Is there anything I can do to work properly my external case?

I have Asus M4N78 SE.
I recently bought a USB 2.0 external case for 3,5" hard disk.
I connected to this mobo, I tried all 12 usb ports but the transfer speed is always... 1MB/s

I tried the device to different a pc and speed was ok.
I also tried another usb device(a stick) to m4n78 se and speed seemed to be ok.
So...
do you have any idea why the speed is just 1MB/sec?
Is there anything I can do to work properly my external case?