The 17-inch laptop is a unicorn these days. But in the gaming world, the arguably huge form factor is alive and well. Alienware has doubled down on its colossal clamshell, simply known as the Alienware 17, with an AMD-powered variant.With an AMD Radeon HD R9 M290X pushing the pixels behind its 1920 x 1080 anti-glare screen, this version of Dell-owned Alienware's notebook comes in $350 cheaper than its Nvidia-toting counterpart. Given that AMD's latest mobile GPU houses twice as much video RAM ? 4GB to the GeForce GTX 860M's 2GB ? that's not a bad deal at all.Aside from that, nothing about the Alienware 17 has changed, including its gigantic frame. Both the MSI GS70 Stealth and Asus G750JX are thinner and cheaper, but fall on different ends of the spectrum in terms of hardware, design and overall focus.