Evgeniy
ekondrs@gmail.com
Despite the nVidia declares the CUDA technology works on all graphic cards starting from GeForce 8xxx series and newer, the Firefly calculations are possible only for cards based on GT200 chip and above (which supports compute capabilities 1.3 or higher).
However, it is necessary to understand that some video cards of GeForce 2xx series (likes to GTS 250 for example) are based on older G92b chip, Firefly calculations on which are impossible as well.