Dear Yu, The graphic card I am using is Nvidia Quadro FX580. If all you want is Pymol and Coot, you don't need a high-end graphic card.
Some commercial molecular viewer requires a really high-end Quadro graphic card. If you plan to use those packages on the same machine, you may want to check their websites for the high quality 3D-stereo before purchasing them. Cheers, Duangrudee ___________________________ Duangrudee Tanramluk, Ph.D. Institute of Molecular Biosciences, Mahidol University Puttamonthon 4 Road, Salaya, Nakhon Pathom 73170 THAILAND