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 fit-PC3 USB bandwidth 
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Joined: Thu Sep 09, 2010 2:18 pm
Posts: 4
Post fit-PC3 USB bandwidth
Hello,

I would like to connect 3 USB webcams to the fit-PC3. 1 of them is 720p MJPEG compressed while 2 of them are VGA un-compressed video feeds.

Using other computers, I have had the problem that there was not enough bandwidth available on the USB ports. Basically, I could connect 1 HD and 1 VGA cameras but not 2 VGA because they are not compressing their data and it is taking all the available bandwidth.

My question is: before purchasing the fit-PC3, does anybody know how many USB hubs there are inside the computer? If I am connecting these 3 USB cameras on any port, is there a way to not share the bandwidth among them?

Thanks!

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Thu Feb 09, 2012 4:34 pm
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Joined: Thu Jun 02, 2011 1:13 pm
Posts: 1260
Post Re: fit-PC3 USB bandwidth
The Chipset used in Fit-PC3 contains x3 USB2 Root HUBs with EHCI.
In addition there is USB3 interface supporting additional, independent, high-speed USB2 channel.
Therefore, no problem to connect x4 USB2 high speed devices without sharing the bandwidth.
Of course you should consider that connection of mouse/keyboard to one of the HUBs that somehow will slows down the channel.

In order to take advantage of x4 high speed USB ports connect the devices as following:
Back-Panel:
1) Any port of dual USB2 connector
2) Any port of dual USB3 connector
Front Panel (from left to right):
3) First or second single USB2 connector
4) Last single USB2 connector
(*) Note that third single USB2 connector is shared with HUB related to dual USB2 connector of the back-panel

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Gabriel Heifets

Fit-PC2/3/IntensePC support.


Sun Feb 12, 2012 9:43 am
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Joined: Fri Aug 17, 2012 8:59 pm
Posts: 4
Post Re: fit-PC3 USB bandwidth
How many USB separate controllers fitpc3 has, two (USB2.0 and USB3.0)?


Tue Sep 11, 2012 1:27 am
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Joined: Thu Jun 02, 2011 1:13 pm
Posts: 1260
Post Re: fit-PC3 USB bandwidth
Fit-PC3 has 3 USB2 controllers, and one USB3 controller.

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Gabriel Heifets

Fit-PC2/3/IntensePC support.


Tue Sep 11, 2012 1:02 pm
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Joined: Fri Aug 17, 2012 8:59 pm
Posts: 4
Post Re: fit-PC3 USB bandwidth
gabrielh wrote:
Fit-PC3 has 3 USB2 controllers, and one USB3 controller.

Thank you.
But I think you are wrong, because in this scheme

Image
I can see only two controller USB2.0 and USB3.0


Tue Sep 11, 2012 3:10 pm
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Joined: Thu Jun 02, 2011 1:13 pm
Posts: 1260
Post Re: fit-PC3 USB bandwidth
I will appreciate if you will mark me those controllers you concern of

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Gabriel Heifets

Fit-PC2/3/IntensePC support.


Thu Sep 13, 2012 7:52 am
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