Fortunes can change quickly in Silicon Valley. Not that they need another reminder, but observers of the tech industry are seeing yet another back-from-the-grave act play out with semiconductor second fiddle Advanced Micro Devices (AMD -0.20%), whose shares are up a cool 70% so far this year. However, there are some that who AMD's return to glory is just getting started. So how much further could this company go, and how should investors play this emerging tech opportunity? In this video, Fool contributor Andrew Tonner breaks down why AMD could still have room to run.