Majestic One said:
or if it is just PCI or PCIe (x1, x4, x8 or x16)
another thing, if it IS for GPU issues, what kind of GPU will you be using (GeForce or ATI?)
GeForce or ATI is irrelevant here. But, sure, sometimes, not all cards can be fit into the board, due to sizes, etc. And that's why you need to do your homework a bit when buying a motherboard. It is impossible for the manufacturer to just build a board that fits everyone's need.