why do i have 8 usb root hubs but only 3 usb ports

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Adam
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Can someone explain to me how this usb stuff works. It's not that I'm computer illiterate, just that this is confusing. I believe my computer specs are listed in my profile, if not, let me know. I have two usb ports on the right side of my laptop, one usb/esata combo port, and a sd memory card reader. In device manager, I have eight usb root hubs, six running at full speed, two high speed. Is this normal? I think the usb ports are usb 2.0 as the laptop is only a year old and the other day, I used an older hp laser printer though usb and got the "this device can perform faster if you plug it into a high speed port" message. Can someone help me understand this a little better so I don't feel like my computer isn't working right?

I also have six usb universal host controllers and two usb2 enhanced host controllers if that helps out any.

I just want to know id my laptop has usb 2.0 I have read that if you have at least one usb2 enhanced host controller, you have usb 2.0 ports. I also know that some devices share a usb hub on the mb. I also have a built in usb 2.0 webcam.
 

managed

Allan
Moderator
Joined
May 24, 2003
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15,151
Go into Device Manager, click the + next to Universal Serial Bus Devices, right-click a Usb Root Hub > Properties > Power tab, that will show what devices (if any) are connected to that root hub.

As you said some laptops use Usb for internal devices like Optical drives, card readers etc. and I think these may be Usb 1 or Usb 2.

Also as you said you do have Usb 2.0 if you see an Enhanced Controller.
 

Beta19

Adam
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It seems that the two usb ports on the right side of my laptop and the sd card reader all share a hub and I think the usb composite device is my eSATA port which a usb/eSata combo. Both of these are high speed. So I would assume that all of the other usb hubs running at full speed then, are internal on the mb? If that is the case and the usb ports are indeed usb 2.0, is it normal to take two minutes to transfer about 2 gigs of data from my hard drive to a usb 2.0 flash drive and vice versa?
 

dustyjay

Jay
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Jan 23, 2003
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Transfering that much data to a thumb drive or from a thumb drive can indeed take 2 or more minutes to complete.
 

Beta19

Adam
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488
So, I'm just being paranoid, then. I tend to do that. Thanks for taking time to answer that for me.
 
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