Quote from $lave2bmw:
It is the regular agp slot. Say i wanted to add another 2 monitors to the setup after that giving me a total of 6 lcds, would i add a third video card for that?
Yeah. You can add single, dual or quad monitor cards. Duals cost more than twice as much as a single, and quads cost more than twice as much as a dual.
There's also a limited amount of PCI slots in your mainboard. And finally there's heat to consider. Not sure about this, but I suspect that a dual will give off less heat than two singles, and a quad less heat than two duals. I run a GeForce 6 in my AGP and 3 G450s, and I had to buy a couple extra case fans. They are cheap and easy to install.
If I were you and you have a tower and say 3 extra PCI slots, I'd go with a couple one-monitor PCI video cards. Then if yer raking in the big bucks, you can add a dual or even a quad. Also, buy a couple case fans (they're about 5 bucks each and easy to install).
If you bought a desktop, you'll need to see if you have room for more fans, and count your PCI slots.
Quote from $lave2bmw:
what im looking to do is end up with 4 lcd's, so should i purcahse an additional pci card with the same radeon chip?
Some folks will make the arguement that one should have the same graphics subset. I never bought into it. My previous setup with a certain Intel chipset and video card combo was supposed to fail, but I got it to work. It's certainly easier if you have all the same card, but it can be quite a bit more expensive and you may get less of a system.