Re: [Motion-user] USB PCI-E card = not enough bandwidth?

[<jt...@mt...>]

On Sunday 12 February 2012 04:49:45 Sebastian Arcus wrote:
> On 11/02/12 17:39, Grant wrote:

> Any particular reason you want a USB 3.0 card? Keep in mind that, if my
> understanding is correct, the USB 3.0 bandwidth only applies when using
> USB 3.0 devices. The total bandwidth you can use with USB 2.0 devices
> (such as your webcams) will still be the normal USB 2.0 bandwidth.
>
> And talking about USB 3.0 - this card would have to have a chip which
> can do both USB 2.0 and USB 3.0. This makes it a relatively recent
> design. I wouldn't be at all surprised if it turns out in few months
> time that there are bugs in either the design of the chip or the driver
> code which handles it - which is what might be giving you problems.
> Somehow I would feel safer using for the moment being one of the
> tried-and-tested USB 2.0 chipsets, with confirmed bug free support under
> Linux - until things get a bit more mature with USB 3.0

I have a mobo with usb 3.0. Several 2.0 only devices behave weirdly when 
connected on the 3.0 ports, although the mfg claims 2.0 compatibility. for 
example pen drives wont be detected as boot device and some wifi modules 
simply drop connections and require a reboot. OTOH some wireless dongles work 
without a hitch. 

-- 
Rgds
JTD