Accessories and Documentation
The brackets with centred screws on the left are used on top of the spacers on the top side of the motherboard. The four, hex end screws lock into the foam padded back plate on the back and both halves are secured to the motherboard with the thumbscrews.
The AMD set uses a similar setup, but can use the stock back plate in some instances. Remove the plastic bracket off the board and screw in Noctua brackets on top of the spacers and mount the cooler.
The bag of common parts consists of the low and ultra low noise fan adapters, NT-H1 thermal compound, SecuFirm2 mounting kit and a Noctua case badge.
As always, the instructions are sent in a little folder, with both AMD and Intel specific instructions. Choose your weapon and enjoy the ease of the install. If you do get stuck, like which way the brackets go on, the book is very descriptive and well illustrated to solve all your questions.
I had to get the images of the hardware before I could start assembly. As you can see, those flat grooves on the sides are sized just right to accept the super sticky tape backed, rubber anti-vibration pads included in the common bag. These should do a great job of isolating the fan.