The interface on hat laptop is USB 2.0. Topping out at 480 megabits per second you PCI 1.0 slot (that's very dated) is moving about 1,067 megabits per second and I'm not showing what PCIe does yet.

This is the easy reason why you can't put a video card on USB 2.0 and play games.

You'll find the Xbox/PS3 to be the cheap fix.