How many PCI express 1.0 slots are used in a computer?

I’m looking at helping a friend build a computer from the ground up and the graphics card he is looking at will block one of the PCI express 1.0 slots. This will leave one PCI Express slots open and one PCI slot. The card uses a PCI express 2.0×16 slots. Will this allow me to [...] http://bit.ly/rkbGOE