Gigabyte GA-X58A-OC i can´t boot without nv_disable=1 -f

hi, am trying to install mavericks for first time but i cant boot whitout the flag nv_disable=1 and -f i dont know why i tried every forum already and thats why im stating this one, by the way my graphics card its a ecs geforce 9800 of 1gb

thanks a lot for any possible help