usb speed check revisited

I thought the 8 usb ports on my Gigabyte GA-P35-DS3R ver 2.0 were all
usb 2; didn't think much of the posting info at first.

But both the post info & pc-wizard say that only 2 of the usb ports are
of the usb 2 type & the rest are usb 1.1; & there isn't any info on which
2 usb ports are usb 2.

Is there any way to check/measure the speed of each usb port on the
motherboard? Or is the usb 2 designation ver 1.1 until a usb 2 device
is connected??

Are all new mother boards like this??? for the same chipset, ichr9???

The manual only points to each usb port as "usb"........

student wrote:
> I thought the 8 usb ports on my Gigabyte GA-P35-DS3R ver 2.0 were all
> usb 2; didn't think much of the posting info at first.
>
> But both the post info & pc-wizard say that only 2 of the usb ports are
> of the usb 2 type & the rest are usb 1.1; & there isn't any info on which
> 2 usb ports are usb 2.
>
> Is there any way to check/measure the speed of each usb port on the
> motherboard? Or is the usb 2 designation ver 1.1 until a usb 2 device
> is connected??
>
> Are all new mother boards like this??? for the same chipset, ichr9???
>
> The manual only points to each usb port as "usb"........


See section 5.19.8 on PDF page 205.

http://download.intel.com/design/chipsets/datashts/31697202.pdf

Port speed is set dynamically, as a function of the connected device.
To learn more about any connected device, use this application.

http://www.microsoft.com/whdc/device/stream/vidcap/UVCViewdwn.mspx

bcdUSB records the maximum speed the device plugged in, claims it
supports. That is part of the config space.

http://www.beyondlogic.org/usbnutshell/usb5.htm

"The bcdUSB field reports the highest version of USB the device supports"

The "Current Config value" indicates the current port setting,
versus the max that the bcdUSB shows you.

In the case of the front ports on the computer case, sometimes a
reduced "Current Config" is caused by the signal quality as it
travels over the cables leading to the motherboard. Some Antec
cases, have USB 1.1 capable front ports. On Antec cases that
support USB2, the word USB2 is printed on the circuit board
that houses the front USB connectors.

If you had a USB flash stick, I suppose you could bench it with
HDTach. If you see a read speed of more than 1MB/sec, then
chances are it is running at USB2 rates. (12Mbit/sec is 1.5MB/sec,
but there is some protocol overhead that prevents the full 1.5MB/sec
from being achieved. 1MB/sec might be more typical of a USB 1.1
limited flash device.)

There is a company making a USB loopback plug/tester, but I doubt they've
sold very many. Not many people know about it. You can use one of those
to test transfer rate. It might even give statistics on things like CRC
errors or the like.

Paul