An interesting thing happened to my gaming PC this year. It started showing its age (I’d be much obliged if you at least feign shock). I began to notice the symptoms the moment I powered up Starcraft 2: Heart of the Swarm for the first time. My frame rate was consistently plummeting to around 20 frames per second. I was flabbergasted. Why would this be happening, I thought, when Wings of Liberty ran (with the same graphics settings, mind you) at around 60FPS or better?