Mini PCI is an extension for Laptops, not for PC.
This is a mini PCI card. There's a slot at the bottom of the laptop for that.
However, I don't think that there is a miniPCI video card. I think that What you have is what you're stuck with. But, no fear. I think newer laptops will eventually have a dedicated multip GPU port. Like a PCI-E x16, but for laptops.