It should have automatically downloaded and installed through Steam a couple weeks ago. You can see what version you're using by looking at the bottom left of the save screen. Mine says 220.127.116.11.4. Your CPU is so good that it may have installed it and you didn't notice. Since it just improved CPU usage people that weren't having CPU bottlenecks didn't see much of an improvement.
For me it increased my performance greatly. There is a place in Markarth at the top of the steps in front of the Stonekeep entrance that was really bad. Before the patch I would drop as low as 11fps there. Now I get between 30 and 35. At the top of the steps in Whiterun before going into Dragonreach, looking down at the tree I would get around 18. Now I get around 38. Even out in the world I usually didn't get higher than 50, but now I stay close to 60. It's honestly the best performance patch for a game that I've ever seen.
Even the highest end i7's bottleneck with Skyrim. Though this might explain why the game has started acting retarded. I launch in, and am forced to alt+tab out and back in order to force the game to act normally.