usb speed check revisited

[student]

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"........

 

[Paul]

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

 

[student]

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

Thanks Paul,

Things seem to get more complicated with this new hardware....

Ahhhh, for the days of the simpler Athlon 7....

 

[RobV]

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

A 1 GB USB2 flash drive in both front panel USB ports and the USB port
in a generic card reader in a Antec case runs with HD Tach.

The Memorex 1 GB flash drive has a burst and average read speed of
11.4MB/s (straight line).

1.5 ms Random Access Time (nice). CPU utilization Avg. 3%.

FYI

 

[RS]

plug your 2.0 flash drive into each port .1.1 ports should give a message
that "this device could run faster"

--
RS
2006 FLSTNI
2002 1200C
1991 FLSTF
"What shall we use to fill the empty spaces where we use to talk?"

 

[student]

THAT is a problem as I don't know which "usb 2.0" flashdrive is a "real"
hi-speed flashdrive; as noted elsewhere, a "usb 2.0" drive only means
that it is compatible & runs in a usb2 port & are priced accordingly
(I think I bought the cheap priced version which meant all my flashdrives
are the ver 1.1 full-speed drive.

 

[RobV]

plug your 2.0 flash drive into each port .1.1 ports should give a
message that "this device could run faster"

Six ports on the MB, two in front, four in back. I have two USB 2.0
devices plugged in and running at USB2 speed. I've plugged the flash
drive into all other available ports and the speed is the same.

I think it would default to the slower hubs only if the max current per
port was exceeded on all USB2 hub ports.



[snip]