Dell Home offers its Dell Alienware Graphics Amplifier for $159.99 with free shipping. That's a buck under our December mention and the lowest price we could find by $31. This external graphics card slot upgrades Alienware 13, 15, and 17 R2 and R3 Laptops and X51 R3 desktops to support full-length, double-wide desktop graphics cards. It features 460 watts of dedicated power and a powered 4-port USB 3.0 hub.

Note: A graphics card is not included; you must supply your own.