Now that the Oculus Rift and HTC Vive have arrived, you’re ready to jump into the virtual reality fray. However, like many of us, you might not have the space or the money for one of the powerful new gaming rigs you need to support either headset. But fear not, if you already own a current-gen Alienware 13, 15 or 17 laptop,  there’s a more space and cost-efficient option in the Alienware graphics amp.

The $199 peripheral is an external graphics amplifier that can house a powerful desktop card such as the just-released Nvidia GeForce GTX 1080 Ti GPU. That means that your last-generation, used-to-be-unsuitable-for-VR Alienware laptop can transform into a beefy powerhouse, ready for anything the virtual world can throw at it — provided, of course, you have a compatible Alienware laptop. But if you have a newer system outfitted with Nvidia VR-ready Pascal GPU, the graphics amp can add more graphics oomph for a smoother VR experience and better frame rates on traditional games.
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https://www.laptopmag.com/articles/alienware-graphics-amplifier-vr-tutorial