Ati HD 4850 Please need help with crossfire!

Hi, im probably getting an Ati HD 4850 today, if there is stock in best buy or comp usa. I need this card to play cod5 cause my past 8600 gt does not work now. In reviews ive heard that you can increase the peformance and quality by plugging the vid card with a Crossfire or someting like that. I want to know whats a crossfire and if that comes win the box with the card. Please if theres anything important about this crossfire thing tell me about it. Thanks!!

Basically Crossfire is when you have two or more identical ATI cards connected working at the same time on a motherboard that supports Crossfire.

This will give increased performance on your games, but obviously you need another card and a power supply that  can handle it.

Basically Crossfire is when you have two or more identical ATI cards connected working at the same time on a motherboard that supports Crossfire.

This will give increased performance on your games, but obviously you need another card and a power supply that can handle it. Oh now i get it, thx.

Sordidus