The gaming PC specialist won't prevent users from upgrading their systems.
"Enabling customers the opportunity to upgrade components has been a core tenet for Alienware since the company was founded, and that remains true today," Alienware general manager Frank Azor told Eurogamer.
"The Alienware Steam Machine, announced at CES, is designed to deliver a great gaming experience in the living room and we will enable customers to upgrade components."
He added: "Considering we've purposefully designed the Alienware Steam Machine to be smaller than the latest generation consoles, upgrading the internal components will not be as easy as compared to...
Vince from Awesome Games writes: 'The recent Consumer Electronics Show (CES) unveiled 14 boxy versions of the Steam Machine, all approved by the don of Valve himself, Gabe Newell.
Fourteen, you say? Thats certainly a lot of choice for the consumer, who may be holding off on their Xbox One or PS4 purchase until the initial-year game drought has broken. To be fair, the price of the cheapest Steam Machine will start at around $499, so youre already matching Microsofts entry and clearing more than Sony and Nintendos current offerings. But lets break down what you are getting for that investment.'