Question about video card. I have onbroad graphic but I brought a avideo card that I plan to install now.?

I heard in the past that I have to disable old video driver or something like that.

My question is do I have to? and if yes how to go about do it? I am a newbie working with computer.

Thanks for any answer.|||sometimes the video card will turn it off in your bios when you install it...but watch your screen when it first boots up..usually F2 or F10 to enter the set up....then check onboard video or graphics and change it if it hasn't already...cheers