Nice work - I was just thinking that the darn PSU fan was the loudest thing in my case, or at least the fan that I could hear the most. How much of an effect, if any, does the new fan have on operating temperatures? Also, my PP412 also supposedly has the "Smart Fan," but I've never heard it spin up or down. When exactly is that supposed to happen? The Antec "manual" is minimal, to say the least.