How do I find out wether my device is working on full USB2.0 speed or USB1.1 speed?

[PrayForDeath]

I got this USB2.0 GenX Scanner from a buddy, it's working fine but how do I tell if it's running at a full USB 2.0 speed or only 1.1 speed? Nothing shows me the speed in the control panel.

 

[ITPaladin]

Maybe this will help.

 

[Peter]

USB logic auto-hooks "high speed" devices to EHCI USB 2.0 controller ports, and everything else to OHCI/UHCI. You can use this information to find out whether your device is running USB 2.0 high speed or USB 1.1 full/low speed.

In Windows, open Device Manager, switch to "Devices by Connection" view, and look whether your device is hooked to an EHCI (high speed USB 2.0) controller or an USB 1.1 (OHCI or UHCI) controller port.

 

[ITPaladin]

This got me thinking so I checked mine.

I have these entries under USB controllers:


Standard Enhanced PIC to USB Host Controller
Standard OpenHCD USB Host Controller (x2)
USB Mass Storage Device
USB Root Hub (x3)




Does that sound like my USB 2.0 is working in my XP Pro SP2?

 

[BlueWeasel]

Originally posted by: bdomin
This got me thinking so I checked mine.

I have these entries under USB controllers:


Standard Enhanced PIC to USB Host Controller
Standard OpenHCD USB Host Controller (x2)
USB Mass Storage Device
USB Root Hub (x3)




Does that sound like my USB 2.0 is working in my XP Pro SP2?

That's exactly what Ive got as well. I think "Enhanced" means you've got USB 2.0 capability....as some of the older USB1.1 controllers only say Standard PIC to USB Host Controller.

 

[imported_DangerMouse]

Basically when you plug USB 2 device into non USB 2 (ordinary USB)
Windows XP OS will give pop up message stating something like
'Hi-Speed USB device plugged into non Hi-Speed USB Hub'.
So i guess if you are not seeing this message it implies usb2 is working.
Hope it helps

 

[Steve]

EHCI: Enhanced (USB 2.0)
OHCI: Open
UHCI: Universal

 

[LED]

There has been a lot of changes and confusion since the inception of USB 2.0 in the naming of devices and protocols. Actually there is or what USB Org developers would want to educate the Consumer to believe...only USB which comes in different speed ratings. Here's a write up for Scanners and Protocols but basically the breakdown is as follows:
3 speeds for 2 Protocols-USB2.0 (USB Hi-Speed) and 2 speeds for 1.1 (USB)...

Low speed=1.5Mb/sec (USB1.1 and USB2.0)= USB Hi-Speed and USB
FullSpeed=12Mb/sec (USB1.1 and USB2.0)= USB Hi-Speed and USB
Hi-Speed=480Mb/sec (USB2.0) =USB Hi-Speed

Many Scanners claim USB2.0 @ FullSpeed but it is not true USB2.0 Hi-Speed as only Hi-Speed can claim a speed improvement over USB1.1. The other 2 speeds can claim USB2.0 because it is backward compatible but they do not go any faster then the original USB1.1

LOL...All this change and explanation was made so the Consumer would not get confused over the Speed difference between USB1.1 and USB2.0

So if a Consumer has a Full Speed USB2.0 Scanner and it is plugged into a EHCI (Enhanced -USB2.0) then it will nt work any faster then a USB1.1 device (12Mb/sec) but will show up as a USB2.0 ...confused yet?

Oh and all these devices share speeds so if 2 Full Speed devices are in a Hi-speed Hub with other Hi-Speed devices then the Hi-Speed devices may take a performance hit :Q

More info @ USB.Org

 

[PrayForDeath]

Thanks to all of you for your replies, that was very helpful

 

[silverbullet555]

I wish they made it easier. I have a Maxtor 60GB HD w/ 2mb cache ($18.00 at officemax) in a USB hard drive enclosure with high speed capabilities. Yet, I know it is not transferring at rates anywhere close to that. In fact, using HD-tach it is only going at about 18MB/s (I'm probably using the wrong units there). It is plugged into a USB 2.0 PCI card that I picked up the other day. Device Manager shows the port as enhanced USB and shows this device plugged into it, but to no avail.

 

[Mark R]

Yet, I know it is not transferring at rates anywhere close to that. In fact, using HD-tach it is only going at about 18MB/s (I'm probably using the wrong units there).

Well, it's definitely working in USB 2.0 hispeed mode - of that there can be no question (Fullspeed USB 1.1 would be lucky to get you 1 MB/s). While USB 2.0 does theoretically offer higher speeds than that (supposedly 60 MB/s), in practice 20 MB/s is about the limit - and 18 MB/s is quite reasonable for a USB hard drive.

 

[Peter]

USB 2.0 controllers on PCI bus are usually limited to about 20-30 MB/s. Chipset integrated controllers are on a faster connection than PCI, and have shown up to 50 MB/s.