How to connect to more than 2 monitors using desktop or laptop


could you please tell me how to connect to more than 2 monitors from a desktop and laptop

I'm bit familiar on how to connect 2 monitors using desktop with displayfusion software and from laptop using latptop doc and DF software. but how to connect 3 or more monitor? Is that possible

Any special hardware or software needs to be purchased?
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For a desktop you will need, two dual videocards. For a laptop, i don't think it is possible.

Check the slots that are avaible on your motherboard. Disable com ports and LPT ports that you are not using to free up IRQ's!
TomislavjSystem AdminCommented:

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For laptops, if you require each visual display to show a different picture, you need an adapter, with specialised software. Usually it connects to your VGA output and a USB port. For desktops, depending on how many PCI slots your computer has determines how many video cards you can use. I have had 6 displays running from the one desktop computer, each with different displays. As dmeeren said, you need to disable unused com ports, LPT ports, usb ports, etc to free up IRQs although each pci slot may have it's own dedicated IRQ.
enthuguyAuthor Commented:
thanks all

managed to find " to DVI External Dual or Multi Monitor Video Adapter" cheaper than matrox

enthuguyAuthor Commented:
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