How can I tell which USB slots are 2.0 & which are 1.0

[OscarVogel]

My PC has at least 1 USB 2.0 port. The others are USB 1.x.

How can I tell which is which?

This is what's listed in Device Manager, under "Universal Serial Bus
controllers":

Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Contyroller - 24CD
Intel(R) 82801DB/DBM USB
Intel(R) 82801DB/DBM USB
Intel(R) 82801DB/DBM USB

 

[OscarVogel]

Sorry, I sent this before it I was finished. Here is the complete message
that I ment to send;

My PC has at least 1 USB 2.0 port. The others are USB 1.x.

How can I tell which is which?

This is what's listed in Device Manager, under "Universal Serial Bus
controllers":

Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Contyroller - 24CD
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7
USB Root Hub
USB Root Hub
USB Root Hub
USB Root Hub

When I plug my USB flash drive into one of the ports it appears as "USB Mass
Storage Device" immediatly following the 4th "Intel(R) 82801DB/DBM ..."
device and immediatly preceeding the 1st "USB Root Hub".

So how can I tell if it's plugged into the USB 2.0 port, or what port it IS
plugged into?

Thanks.

 

[Bill Yanaire]

Try plugging in a USB 1.0 device into each USB port. When the USB 2.0 port
detects the 1.0 device, you will get a message saying that a 1.0 device is
plugged into a 2.0 port and you won't the the full benefit of 2.0

 

[John Barnes]

With your USB drive connected, you can check the Properties for each
controller in Device Manager until you find the one it is shown in.

 

[PTravel]

My PC has at least 1 USB 2.0 port. The others are USB 1.x.

How can I tell which is which?

This is what's listed in Device Manager, under "Universal Serial Bus
controllers":

Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Contyroller - 24CD
Intel(R) 82801DB/DBM USB
Intel(R) 82801DB/DBM USB
Intel(R) 82801DB/DBM USB

Go into Device Manager, open the USB section, right click on the USB
controller and open Properties. Select the Driver tab, then click on Driver
Details. If you see "usbuhci.sys" it's a 2.0 port. If you see anything
else, e.g. "usbehci.sys" then it's not a 2.0 port.

 

[R. McCarty]

There might be an easier way. You can switch the Device Manager
View so it shows "View by Connection". You can expand the ACPI
tree to navigate down to the PCI bus, then the "Enhanced" controller
or controllers expanding that will show it's root hub and any USB 2
devices connected.

Microsoft also has a USB Device Viewer that shows the fan-out of
the controllers, hubs and connected devices.
You can get a copy here:
http://www.microsoft.com/whdc/device/stream/vidcap/UVCViewdwn.mspx?

 

[OscarVogel]

Thanks. All the suggestions were good. But that UVCView utility from MS
really works like a charm.

Thanks again.

 

[DanR]

Well I am really confused. I've noticed this usb and enhanced usb
nomenclature before in device manager. But I've assumed that all modern
computers have ALL usb2 ports. I just downloaded and ran the USB device
viewer. According to it I have 20 usb ports. I do not. And by pure chance my
keyboard, mouse and UPS are connected to a USB Universal Host Controller and
my external hard drive is connected to a USB2 Enhanced Host Controller. And
it tells me I have 8 USB2 ports. It's late and dark in this room so I can't
crawl around to the back and count the USB ports there and on the front but
8 sounds about right for the total physical USB ports on my machine.

 

[Uwe Sieber]

An physical USB2 port has two logical 'incarnations', one for
USB1 and one for USB2. The USB1 incarnations are often created
in groups of two while the USB2 incartations are all in one
group.
<http://groups.google.com/group/micr...read/thread/98ca6ee9a9cff909/8e2386086a0c9c97>

Uwe

 

[DanR]

Thanks Uwe for the link. I still don't see this clearly though. If my MB has
8 physical USB ports how many USB2 devices can I connect and run at USB2
speeds. And I think I mean enhanced speeds. If I connected an external hard
drive to each of the 8 ports would some run at higher speeds than others.
Does Windows somehow look at the device and make a judgment call on whether
the device should run at USB2 enhanced speeds?
Do I read you correctly that it doesn't matter exactly "which" port a device
is connected to?

 

[Antonio Amengual]

No you can't try that option except bios mobo doesn't support usb 2.0, 1
will be used instead
in device manager yu can see if usb port are in enhanced mode that means
that(2.0) will be used
ussually new mobos uses usb 2.0


Saludos

Antonio

 

[Uwe Sieber]

Today's mainboards have USB2 ports only. Some years ago there
was a short period when USB2 was made by an additional chip but
that's past. XP will show an balloon tip "This device can perform
faster" if you attache an USB2 highspeed device to an pure USB1
port.
So it doesn't matter which port you are using, they all
can work either in USB1 or USB2 mode, it just depends on
the capabilities of the attached device.


Uwe

 

[R. McCarty]

I haven't seen a recent motherboard with only USB (Enhanced) ports.
Yesterday I installed/setup a new rig with an Intel 945 motherboard &
it definitely came with both Standard/Universal ports along with USB2.
Of course I'm loosing touch with AMD based systems since everything
I deploy is Intel based - maybe the USB 2.0 only is for AMD systems ?

 

[Uwe Sieber]

As I wrote, the Standard ports are nothing else than
logical incarnations of the USB2 ports which are used
for USB1 devices only.

http://www.microsoft.com/whdc/device/stream/vidcap/UVCView.mspx
With this tool you will see that the number of USB2 and USB1 ports
is equal because they are identical physical ports.

Just try this: Attach an USB2 flash drive. Open an
Explorer window. Then deactivate the Enhanced controller
in the device manager. You will see the drive disappearing
in the Explorer and then come again, this time with a
"this device can perform faster" message under XP. It
just uses the USB1 incarnation of the same physical port
now.
Ensure that there are no open handles to this or any other
USB drive and that no other USB drives are in use. Windows
will ask for a restart then.

In UVCview you can see the USB drive appearing then on
a standard port even you did not touch it.
But deactivate the 'Auto refresh' while the experiment,
it leads to a massive slow down when Windows handles USB
events.


Uwe

 

[DanR]

OK, this is making sense. The device itself is plug and play and devices
like keyboards and mice are USB1 and thus tell Windows to operate in the
USB1 mode. An external hard drive being USB2 likewise tells Windows to use
the USB2 protocol. Or something like that.
I figured that all USB ports on new computers had to be USB2 capable or else
marked otherwise. I've never seen USB ports labeled differently on any of my
computers to indicate which ports are USB1 and USB2. And if it were true
that some were USB1 and some were USB2 they would surly have to be marked as
such.