after hours and hours
of reading up on what video card solution (single-GPU or Xfire ) to get for my new gamer PC thats gonna be up and running on 2nd week of February ( PSU coming in late)..
Asus P8P67-M PRO LGA 1155 mATX Intel Motherboard
Intel Core i5 2500K LGA 1155 Boxed Processor Intel Core i7 2600K LGA 1155 Boxed Processor
Patriot Extreme Performance Sector 5 G Series 4GB DDR3 (10666, 1333 mhz)
Corsair CMPSU-650TX 650-Watt TX Series 80 Plus Certified Power Supply
I can conclude that..
1) two Radeon 6850 xfire = superb performance, but super bad temperature.
2) single GTX570 = falls behind in performance in comparison to the R6850 Xfire, but great temperature
3) both solution are about the same price (about $350)
4) if only GTX570 would cost $300, then I would get this. I'll sacrifice few FPS for simplicity of single-GPU solution and great temperature spec.