You can turn down the resolution of games as an option.

Also, have you tried Airmech? It offers a "very low" graphics setting, meant for older hardware. Not exactly 60 FPS gaming, but at least the game as an amazing community to help you out with problems! Check out Airmech here: http://airme.ch/1D0k3VF

Maybe you should try a new genre of games? Try RTS (real-time strategy). Airmech is a great one, and so is Starcraft II. Check it out! http://airme.ch/1D0k3VF