Re: sb700 southbridge and several USB2 devices => bug?

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On Wed, 20 May 2009, Julien de Rosny wrote:

> Here I have still a question. On the motherboard user(s manual, it is said that
> there are up to 12 USB 2/1.1 ports. Moreover, it seems there are only two usb
> buses. So the bandwidth of each bus should be 480Mbps*6 in case of the 6 port
> are occupied,

No.  It isn't possible to send different data to the 6 ports 
independently; they always get the same data at the same time.  So the 
bandwidth of each bus in 480 Mb/s, not 6 * 480 Mb/s.

> So even if the WIFI stick takes 480Mbps, there are still 480Mbps*5
> bandwidth remaining and even if the dvb device is not correctly implemented, it
> should no be affected, isn't it?

No.

Alan Stern

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