"However, the HR-02 is 140 millimeters wide, indicating that 120mm fans are not the best option for this cooler. Indeed, the peak CPU temperature is about 5°C lower with one 120mm fan and 3-4°C lower with two 120mm fans compared to one and two 140mm fans, respectively."

Sergey, did you mean that 120mm fans were 5°C warmer than a single 140mm fan and 3-4°C warmer when used in pairs compared to 2x 140mm fans?

For Part 2, can you also include 2 other CPU cooling products that consumers who are looking at Noctua NH-D14 and HR-02 are likely going to consider.

The first one is the newly released Thermalright Silver Arrow. It retails for $79.99 but already comes with 2x140 mm ultra quiet fans - http://www.svc.com/silverarrow.html

The second one is the newly released Corsair H70 - http://www.corsair.com/products/h70/default.aspx

Since HR-02 ships without any fans, once you factor the cost of the fans, H70 becomes a competitor.

"We decided not go for Noctua’s default fans for a reason that will be explained in our next article."

I think you should include the results anyways because I imagine most users will NOT substitute the fans on the Noctua as it already ships with stock fans.

A comparison of how noisy the Noctua vs. Thermalright fans are would also be interesting.

This is exactly the way heatsink cool-offs should be done: identical fans, cpu's in torch mode.

Thank you!

beautiful review i was waiting for such a review between these to high end cpu coolers Thanks Xbitlabs.