ATI Radeon HD 4850 CrossFire in 3DMark Vantage GPU: 625MHz, memory: 2200MHz):
NVIDIA GeForce GTX 280 in 3DMark Vantage (GPU: 602MHz, memory: 2214MHz, shader: 1296MHz):X5089 H7611 P11918
NVIDIA GeForce GTX 280 overclocked in 3DMark Vantage (GPU: 675MHz, memory: 2400MHz, shader: 1456MHz):X4889 P10802
The CrossFire setup uses a faster CPU but it seems like two Radeon HD 4850 will offer about the same performance as a GeForce GTX 280, at least in 3DMark Vantage. One GeForce GTX 280 will cost you around $649 while two Radeon HD 4850 cards will cost around $400-$460.X5384 P11854