I upgraded in August, so I was doubtfull between a single GTX280, or 2 4870 in CF (remember that the price was the same at this moment, 450â‚¬). I read tons of reviews, and I thought... Why not? Let's give them a try... And I am very happy with my decision. I didn't do many tests with a standalone 4870, but if you read some reviews, you can check that CF performs about 30 - 70% more than a standalone card.
I like playing games smoothly, and I wanted a "big" difference between my old 8800GTS G92, so I went crossfire. In august, 4870X2 wasn't released yet...
Today, with a single card is enough to enjoy all games (except crysis
), but the second card makes the difference. And... ATI 4870 would be at the 200 - 230$ before the year ends, so I think that when it's price go down, you must buy the second card.