How do dual monitors and video cards work? Do you have to get two separate cards?

Back in the days, you would have dual video cards, but now the motherboards have dual support? does that mean 2 video cards?

How do dual monitors and video cards work? Do you have to get two separate cards?
There are a couple ways to do it...Either:


1) 2 Video Cards (Each with 1 Display Port), 2 Monitors


2) 1 Video Card (with 2 Display Ports), 2 Monitors


OR


3) 1 Video Card (with 3 Display Ports), 3 Monitors ;)





Use for dual display or triple display (example)


http://www.ati.com/designpartners/media/...
Reply:Here is some information, I got from Kim Komando website%26gt;%26gt;


http://www.komando.com/tips/index.aspx?i...
Reply:You need a video card that supports multiple displays. Some have more than 1 port on them so that You can connect 2 monitors to them.
Reply:Dual-card or Multi-cards (AGP/PCI, PCI/PCI PCI/ISA... whatever combination) is easier to setup within Linux's GUI, X11 System, theoretically equally easy using single card with multiple display ports, but with Windows single cards with multiple display ports are your only option. Motherboards should have no say in this area.
Reply:You don't need 2 video cards. You should get a card that has 2 ports or more on it. Cheap ones usually only have one. Then follow the instructions with the video card about installing 2 monitors. It should be very easy. If you have Windows XP it will be even easier. Good luck.