patiko citata:

From there, things only get messier, and the hardcore gamer can spend 
thousands of dollars in an effort to procure the best graphics performance. 
Want to beat a 4870 X2 with an Nvidia solution? Buy a couple of GeForce GTX 
280s. Want to beat that with an AMD solution? Buy another 4870 X2 and run 
four-way CrossFireX. Want to go faster still? Add a third GTX 280. And now 
you’re talking about an expensive motherboard and a powerful CPU able to 
keep up with all of that graphics horsepower. Aye carumba. Where does the 
madness end?

http://www.tomshardware.com/reviews/geforce-gtx-295,2107-4.html