i have a hp 6127c and run win 7. it has a intel g33/g31 chipset. i want to play civ v on it, so i need to replace the chipset with a video card. i am thinkingt nvidia 9500. i believe i am running 300 watts. i really don\'t know two things; first, will the nvidia physically fit into the pavilion 6127 and second, will i have to disable the chipset (how do i do that?)?