Let’s take a look at the graphs. On 3.6GHz clock using the stock thermal paste the cooler was doing 36.43° dropping the cooler down to the bottom. When the same cooler was tested using the Noctua NT-H1 there was a significant thermal improvement with cooler doing 29°C though at the bottom part of the graph.
With overclocked 6850k to 4.3GHz at 1.350V, the cooler again went to the bottom using the stock thermal paste as it was doing 55°C. With Noctua NT-H1, the cooler was doing 49°C. Again, we are seeing quite an improvement over a stock paste though still sitting at the bottom of the graph.
I could not measure the sound level of the unit as the summer season here is at peak and ceiling fan plus the noise coming out of the room would invalidate the actual sound level. Based on my experience with the fans and coolers testing so far, these fans are quite noisy at full speed and custom fan curve is in order.