GeForce GT 240M is a middle-class level GPU of the 200M Series released by NVIDIA in 2009/2010.
The biggest hindrance it has is the fact that it only supports DirectX up to 10.1 so DirectX 11 games aren't supported.
It's based on the architecture 'GT216', same used on the GeForce GT 230M and features the exact same amount of Pipelines and same memory type. The only difference is the increased clock frequencies. Therefore, GeForce GT 240M is just a fast GeForce GT 230M.
Demanding games should run at low or medium settings, depending on the resolution + DirectX version used. Very demanding games like Metro 2033 might be unplayable even at the lowest settings or only playable at the lowest resolution, which is unbearable, even to the casual gamer. Even old demanding games like Call of Duty 4: Modern Warfare cannot be played at MAX settings smoothly.