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Curious About Usb


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#1 blueandgold04

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Posted 12 February 2007 - 10:19 AM

this is a post out of curiosity. i have onboard USB and a PCI USB card. is there a difference in performance between the two? is it better to use one over the other?

kind of hoping to learn some computer theory along the way. :thumbsup:

cheers,
bg04
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#2 stevealmighty

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Posted 12 February 2007 - 10:49 AM

I'm sure that in the entire technical scheme of things, there's a difference. However, I've had a pci usb card installed and then removed it (only to whish I left it installed). When I had things running from the pci over the usb off the motherboard, I didn't notice any difference in speed or performance. As for wich is better, well, based on my experience, I can't say one way or the other wich is better, as I saw no difference between the two.

There's some good reading on it HERE from Wikipedia.

Hope this helps at least a little bit! :thumbsup:
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#3 Mr Alpha

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Posted 13 February 2007 - 06:14 AM

Adding a PCI card will always add something more to the communication and so reduce the bandwidth and increase latency. However, I believe the performance differences between different USB controllers will mask any performance difference between onboard and PCI USB.
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#4 TheTerrorist_75

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Posted 13 February 2007 - 11:45 AM

If your onboard USB ports are USB 1.0/1.1 and the PCI USB card is USB 2.0 there will be a vast improvement in transfer speed for USB 2.0 devices.
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