I am for the most part computer illiterate. I don't know the nuts and bolts about PCs. I have a Dell Inspiron 531, a model no longer even available. It has an Nvidia 6150 integrated graphics chip. I play DDO, which is a large MMORPG. I would like to upgrade to a real graphics card so I could maybe play on something other than the low graphics setting in the game. But I don't know what my computer will support and what it won't. I don't know if I have a PCI slot or not. If I do I don't know what sort of PCI slot it happens to be. Any suggestions?