Adding more RAM or a new graphics card can help improve the performance of your PC, but only if your current RAM or graphics card is not meeting your needs. It is also important to consider what programs your computer will be running and for how long. If you are using basic programs such as web browsers and word processing, more RAM or a new graphics card may not be necessary. However, if you intend to use your PC for gaming or intensive video and photo editing, additional RAM or a new graphics card might be beneficial.