Slow USB Transfer Speed

HI All,

If I use the 2 USB ports on the front of my case I get a transfer speed of about 11.3MB/s.
If I use the 4 ports at the back of my case(onboard) then I get a transfer speed of about the same.
If I use the 4 ports connected via PCI(not Express) slot I get a tranfer rate of about 4.9MB/s.
The Card connected to the PCI slot is called a Silicon Image Sil 3x12 SATALink Controller Driver.

As far as I know I have the lastest drivers for my motherboard, USB devices and SATAlink controller.
Optimising external Drives and flash drives for performance doesn't make a difference either.

I have no idea why these transfer speeds are so slow and it's very frustrating.

Hopefully you guys can help.

Thanks in advance!

 

Check out this thread for a discussion on the topic:

http://forums.majorgeeks.com/showthread.php?t=246922

Hope this helps.

 

Thanks for the reply Gman but unfortunately that thread didn't help me at all.

Other ideas?

 

Hi plodr,

Thanks for the reply.

1. Win XP SP3

2. Keyboard, Mouse, Printer and 1TB external HDD attached to 4 onboard USB's at the back of case. 1 Internet connection attached to Satalink with 3 open slots. The front 2 USB's I use for Flash Drives and Externals when I'm copying stuff.

3. There was never a problem with any of my drives. I installed the Silicon Image Sil 3x12 SATALink Controller Driver for the internet connection because I always use the front 2 USB ports and didn't want to have to disconnect and reconnect the whole time and if I ever needed extra drives for any reason. I am also using the Satalink to connect one of my HDD's as I only have 4 SATA ports on my MOBO. The only problem I have now is that the USB transfer speed has become slow and I am not sure why.

Really hoping you can help!

Thanks

 

Hi Plodr,

I actually made a mistake with that card, it's a VIA VT6212L not a Satalink! Oops!

Hope the op went well ;-)

 

Hope you're doing well plodr.

Ra222r, you may try running USBDeview, http://www.majorgeeks.com/USBDeview_d6115.html
Look at what USB devices are installed on your system. Uninstall anything you recognize and don't use anymore. Take a look at what is plugged into where. You may be having a conflict. You may try uninstalling everything from the affected PCI card and plugging things back in one by one to see if one thing is the problem.