No, integrated means you have a GPU chip on the board taht you can enable and disable in windows
You just put in he new card after disabling the integrated. As in, disable then shut down, unplug PSU, put in the new card turn back on and DL and install the drivers for it and you should be all good. And IMO, I don't think you're running the games at max settings with the integrated, I know you'll say you do, but iono
When I was using the integrated x200 I only could run bf2 on low settings(1 or 2 med.) at 1024x768.