replacing graphics card in Precision T1500

Hi,

I'm interested in buying a T1500 workstation which I would be using for scientific computing including the gpu. 

However, since the graphics cards available in this machine seem to be at the lower end of the spectrum,  I would like to install a higher performance nvidia card.

Would the T1500 system configuration support a higher performance card such as the 1GB GTS450 or upwards?

Thanks

Patrick