Hi all,
As Tneves said, the PCIe cards are much better.
You are not giving us enough information to help you.
Have you upgraded your computer and now you have one with PCIe slots?
Has your present graphics card burned out and you want to upgrade it?
Is there a particular game that you want to play?
And, (by the way, my old mum used to say "I want, doesn't get". There are ways of asking questions that will give you a much better result), if you want any more specific information then go to the 'Technical support' board and post your Dxdiag and your specific problem there.
Regards, Dave