Que televisão falas tu? De um LCD FullHD,de um LCD quase HD :) , de uma televisão CTR ainda das antigas? Experiementa alterar a definição no setup de rfactor que encontras na pasta rfactor.
"As was said earlier your problem is the S-Video cable.
what is the output of your card set to? RGB/composite/S-video you need to enable the tv input to the same.
You can still use the S-video cable and even the S-video output, but the scart input on the TV needs to have the same mode enabled. My TV enables you to set the input type on each scart via the menu. Same as the DVD player lets you select output type ie RGB, Comp Video, S-video.
I have had this before, if you look at S-video on an RGB enabled socket you get black and white. Also true for NTSC as my brother said.
Its something to do with the Chrome X.Y,Z for the s-video i think.