Will USB 2.0 and 1.1 Coexist?

  • Thread starter Thread starter Raymond J. Johnson Jr.
  • Start date Start date
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Raymond J. Johnson Jr.

If a computer has onboard USB 1.1 and a 2.0 PCI card is added, will the
two work at the same time? I understand that 1.1 devices will only
work at 1.1 speed, but can a system handle the two simultaneously?
 
Yes, they will work simultaneously. USB1.1 at 1.1 speeds and USB2 at USB2
speeds... (i have such a setup, Asus A7V133-C and add-on USB2 card...


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YES - just done it! (installed USB2 card) Now have 6 USB1 and 2 USB2 ports.

But, be aware of potential problems - following this procedure might save
you hours of grief.

First - connect an old PS2 mouse and keyboard. Ensure you have NO active USB
devices (incl cordless receiver).

Having installed USB2 card and drivers and booted, go to System/Device
Manager and UNINSTALL every instance of USB - there's quite a few. Close
down and re-boot with USB mouse/keyboard/receiver re-connected, if you have
them.

XP will then re-install USB's the way it wants them - should be trouble free
(though I had a little problem with Logitech radio controller - k/b worked,
but not mouse - resolved by re-installing Logitech Keyboard driver).

Do tell if this helps - sincerely, Len
 
yabbadoo said:
YES - just done it! (installed USB2 card) Now have 6 USB1 and 2 USB2 ports.

But, be aware of potential problems - following this procedure might save
you hours of grief.

First - connect an old PS2 mouse and keyboard. Ensure you have NO active USB
devices (incl cordless receiver).

Having installed USB2 card and drivers and booted, go to System/Device
Manager and UNINSTALL every instance of USB - there's quite a few. Close
down and re-boot with USB mouse/keyboard/receiver re-connected, if you have
them.

XP will then re-install USB's the way it wants them - should be trouble free
(though I had a little problem with Logitech radio controller - k/b worked,
but not mouse - resolved by re-installing Logitech Keyboard driver).

Do tell if this helps - sincerely, Len
Click to expand...

Thanks to all for the responses.
 
Raymond said:
If a computer has onboard USB 1.1 and a 2.0 PCI card is added, will the
two work at the same time? I understand that 1.1 devices will only
work at 1.1 speed, but can a system handle the two simultaneously?
Click to expand...

Yes. USB 1.1 devices should of course be put on the 1.1 ports (though
they will work on 2.0) reserving 2.0 ports for the things that need it
 
| Raymond J. Johnson Jr. wrote:
|
| >If a computer has onboard USB 1.1 and a 2.0 PCI card is added, will the
| > two work at the same time? I understand that 1.1 devices will only
| >work at 1.1 speed, but can a system handle the two simultaneously?
|
| Yes. USB 1.1 devices should of course be put on the 1.1 ports (though
| they will work on 2.0) reserving 2.0 ports for the things that need it
|
| --
| Alex Nichol MS MVP (Windows Technologies)
| Bournemouth, U.K. (e-mail address removed)8E8L.org (remove the D8 bit)

As I suspected. Thanks, Alex.
 
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