Thank you for reaching out to us newtopcs. This system is upgradeable in the future, however, it is always recommended that you check for compatibility before making your purchase on new hardware. This PC should be able to run Rainbow Six Siege as it does meet the minimum system requirements. However, the amount of FPS you receive in-game will vary depending on the resolution and refresh rate of your display, in-game graphics settings, as well as your network connection. It is always recommended that you check the system requirements of the game you would like to play before making your purchase. If you have any further questions or concerns then please do not hesitate to give our tech support agents a call for any assistance; we're always happy to help.