TechReport: "We kick off the last episode of 2012 with a sneak preview of our upcoming collaborative opus: the How to build a PC guide and video. Then, Valve's proposed Linux living room gaming PC has us perplexed, and we share our Christmas gift suggestions for 2012. Finally, Scott breaks down the complete saga of our Radeon vs. GeForce brouhaha, which unfolded over three successive articles last week. And that's it! Thanks for an amazing 2012, and here's to an exciting 2013."