Well first, you have to have the software to install the videocard. Or your computer wont identify it. All brand computers have them in your reboot disks. Thus, you would have to independently find the software. That would be a pain. But its not a big deal. You would just uninstall it, then install your new video card.
So its not a bad idea, since its not permanent. Its really up to you.
Finished With TF.