Dual screen setup - USB to VGA adaptor

  8342mat 19:35 20 Feb 2011

Hello all,

I have been looking around these forums for a while now, and decided to participate.

After using dual screens at work i am very interested in adopting it for home.

I have an aged, by pc standards e machine desk top,
2.6ghz intel celeron processor
40gb internal hdd + 60gb external hhd
3d AGP intel extreme graphics card
1gb ram.
XP home sp3

Now i only have one vga port and was wondering if the USB to VGA plugins were any good.
for example

click here

i also note this states usb2, not sure if mine are.

I would then connect up a cheap secondhand tft monitor.

Advice and concerns please.



  northumbria61 21:25 20 Feb 2011

"usb2, not sure if mine are." - see here click here

This gives a bit more info on USB to VGA click here - although it is considerably more expensive.

  northumbria61 21:28 20 Feb 2011

Or read more here click here

  8342mat 21:44 20 Feb 2011

Thank you for the info nothubria61.

In amongst a list of USB i have two of note

Intel(r)82801DB/DBM USB 2.0 Enhanced Host Controller - 24D

USB 2.0 Root Hub

Both these would suggest i have USB 2.0
That said i have 6 USB ports, two on the front and 4 on the rear.
Which is which ?

I have read your other links and i seem to be on the right lines, as this is what i am after.


  northumbria61 12:57 21 Feb 2011

"That said i have 6 USB ports, two on the front and 4 on the rear."
Which is which ?

They are all usable USB ports - the 2 on the front are there for "convenience" ie; to save you having to reach around the back of your machine. The rear ones are for more "permanant attachments".

  scotty 14:58 21 Feb 2011

Never come across these devices before but I would suggest you consider changing your graphics card to one which outputs to two monitors. This is the standard way of achieving display on two monitors.

I suspect you will find that the bandwidth of USB2 will give a poor result for outputting to a VGA display. Assuming a fairly standard screen resolution of 1280x1024 with a refresh rate of 60Hz and assuming 6 bits per pixel would correspond to over 470 Mb/sec. In real life applications, I would not expect USB2 to be able to sustain anywhere near this data rate. These are just my quick thoughts, I have not thoroughly researched this subject.

  8342mat 14:51 22 Feb 2011

Thank you to thos e who replied.
I have changed the graphics card to a nvidia geforce 6200a which more than meets my needs.
Now set up and working with two monitors as required.

Thanks and i shal now colse this as resolved.


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