Identical machines, one has SLOW USB 3.0

[jsmith24]

Hi all,

I have two nearly identical machines (same motherboard, drives, etc., just one is two months newer). The newer build gets about 75-80 MB/s transfer speed on USB 3.0, the older one maxes around 30 MB/s. That's using the exact same SD card in a reader, same 3.0 cable, same exact files on the card. Both motherboards are Biostar HiFi A85W, both 4GB same make/model RAM, same WD 1TB hard drives, both running Win 7 64 bit. What could be causing such incredible slow speeds on identical machines?

Thanks,
Jack

 

[rhysiam]

Make sure you download the latest USB drivers from the mobo manufacturer. Often the drivers that Windows installs (particularly Win7), or the drivers that came on the disk with the motherboard, are older drivers which limit performance. I'd bet 8-9 times out of 10, the latest drivers will sort the issue you describe.

 

[jsmith24]

Make sure you download the latest USB drivers from the mobo manufacturer. Often the drivers that Windows installs (particularly Win7), or the drivers that came on the disk with the motherboard, are older drivers which limit performance. I'd bet 8-9 times out of 10, the latest drivers will sort the issue you describe.

I thought I already tried that...but I'll go back, wipe out the old driver, try again. Any other thoughts from the rest of you?

 

[jsmith24]

Well, no luck so far. I thought I had it worked out when the little exclamation point disappeared in Device Mangler, but now when I plug a USB 2.0 device into the 3.0 port, works great. If I plug a 3.0 device into the 3.0 port, it connects, then disconnects, connects, and so on. It never shows up in Windows, I just hear the connect and disconnect sounds. The same 3.0 device works fine in the 2.0 port...though, curiously, I don't get the "This device can perform faster in a USB 3.0 port" warning. Yes, the USB 3.0 device works flawlessly in all our other systems, one of them identical to my "trouble system".

Other ideas? I'm hoping to find a way to delete ALL the USB drivers from the hard drive, registry, etc., to make sure I get a clean driver install and not some bit left over. Anyone know how to do that?

Jack