ASUS M5A99FX Pro USB port problems

[pev]

I recently purchased and installed this new board (replaced an older Asus).

I'm getting "Your USB Mass storage device can perform faster if plugged into a hi-speed port." message at random times. This happens after I plug in USB flash drives. As well as with my built-in USB memory card reader. This happens sometimes within minutes of starting Windows or sometimes after a couple of hours.

So basically any mass storage devices that are plugged into "any" of the motherboard's USB 2.0 ports (including internal ports) randomly switches to slow speeds of about 1MB/sec.


-All drivers are installed properly.
-Motherboard Chipset drivers are up to date.
-Running the latest BIOS. No conflicts of any kind.
-I've tried disabling USB legacy in the BIOS.
-Disabled shutting down power to any USB port.

Anyone have other ideas?

 

[Ketchup]

NM, you answered my first question.

How many BIOSes have you tried?

Do the Asmedia ports give you the same problem?

 

[pev]

I've only tried the latest bios (v 1903), but that's a good point. May try a different version..

The ASmedia 3.0 ports seem to work fine. Have not had the issue there in my testing.

I've tried various USB settings in BIOS, still no luck. I'm about to return the board and get a replacement. I've never experienced this. Ive searched to see if this particular board has similar issues, but the only thing I've found is USB ports going totally bad.

 

[pev]

Update: I replaced the board with another M5A99FX pro and so far no more USB 2 problems.