How do we force Unity 3d build to run on a specific graphics device?

Hi,

I am the happy owner of a MSI G70 Stealth laptop which embarks a Haswell i7 processor with a HD4500 builtin GPU and a dedicated nVidia 880m GPU.

When I build a project as a Windows desktop application and run it, it automatically chooses to run the game using the HD4500 integrated GPU instead of the way more powerful nVidia 880m GPU.

Is there a way to tell Unity to use the best graphics device available on a machine?

Thanks.