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I have decided i am going to dual screen with a USB adaptor and was wondering if anyone has used any of those products before. <br />
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I have found a few on the web - <br />
<br />
Tritton USB to vga video adaptor <br />
DisplayLink <br />
<br />
Am i right in thinking that your computer does not even need a video card with any ports as it uses usb and is a video card as a product. 
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I have decided i am going to dual screen with a USB adaptor and was wondering if anyone has used any of those products before. 

I have found a few on the web - 

Tritton USB to vga video adaptor 
DisplayLink 

Am i right in thinking that your computer does not even need a video card with any ports as it uses usb and is a video card as a product. 

Best USB Dual Screen hardware

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Components are those devices that are internal to a computer -- the PC boards, the central processor (CPU), the memory (RAM), disk and video controllers and so on.