How to run 2 video cards at once?

Can someone tell me how to run two video cards at once


Thanks

How to run 2 video cards at once?
The motherboard has to be set up so that it can take two videos cards. So you need to buy the correct motherboard.
Reply:You need a motherboard with SLI support, meaning an nVidia chipset or a motherboard with crossfire support, meaning an AMD, ATI, Intel, or possibly Via (not sure) chipset, and 2-4 PCI-Express x16 slots (though they may slow down when you use more than one). Then you put a video card in 2 to 4 of the slots, and link them together usually with ribbon cables over the top, but on old ATI cards externally. Anyway, then you boot your computer and Enable SLI or Crossfire in their respective softwares.





What usually happens in either form of multi-gpu is basically that one video card renders on half of the screen, and the other renders the other half, but they do so working together somehow. I'm sure it's pretty complex.





Anyway, that's the basic concept. How efficient this combination is really depends on the game/aplication, but Crossfire usually ranges from 60-90% performance and SLI usually ranges from about 40-75%
Reply:Depends on what you're doing and your hardware. If it's a standard PCI card, plug 'em both in and whichever one you plug your monitor into, will be the one running.





If you're trying to do a dual monitor set up, I think you need a dual monitor card. Using two cards %26amp; two monitors won't work.
Reply:You gotta have 2 of the SAME video cards and they must be SLI able and a mother board that can support it





heres a link you can read the story





http://www.hardocp.com/article.html?art=...
Reply:well if using ATI cards you need the Crossfire bridge, usually comes with motherboards or the cards. also your motherboard has to support CROSSFIRE and have 2 video cards slots. ie 2 PCI express x16 slot





If you have Nvidia cards then most likely your motherboard would come with bridge. the term SLI means you are have duo cards, again your board must have 2 slots for the cards
Reply:you have to have to pci-e slot. its called sli. i think crossfire from ati is like that too, but different approach.
Reply:You need a motherboard that supports SLI and two SLI video cards.

rain roots