GeForce GT 230M is a middle-class level GFX 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 entry GeForce GT 220 part of the desktop 200 Series. The performance should be lower than the desktop GT 220, due to the lower clock frequencies.
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.