What are the benefits of multiple graphics cards?

I'm currently building the mac pro that I want and they allow you to get up to 4 ATI Radeon HD 2600 XT 256MB graphics cards. I've done research on this card and I see that it isn't good for gaming. My question is if I get four of them will the mac then be suitable to play games that require high powered video cards?

What are the benefits of multiple graphics cards?
The benefit is having more cards to assist with graphical processing. This is not going to double the performance, because of many limiting factors I won't go into. The ATI Radeon 2600XT is an ok card, but nothing special. Having 4 of them is a waste of money in my opinion. If you really need game performance, don't waste your time with MAC.
Reply:You can have multiple graphics cards for more speed and better performance.





I dont recommend putting 4 graphics cards on MAC because it does not support very many games.
Reply:4 graphic cards in a MAC,I think thats not a very good thing since not all games are mac compatible
Reply:no mas!