The first step to installing this CPU cooler, according to the directions for an LGA 775 setup, is to install the 120mm fan to the heatsink. To do this, you have to use two of the four included mounting clips. At first I thought I was going to get frustrated trying to get it attached, but it turns out to be pretty easy, unlike other CPU coolers.
The clips fit nicely into the four screw holes and easily snap onto the heatsink without much required force. The only thing that I was unsure of was how to position the fan. Most fans include two arrows indicating airflow direction and blade rotation, this fan didn’t. I could only assume, from the pictures in the instructions and the way the blades were laid out, that the “Deep Cool” logo should be visible upon installation to the heatsink.
The next step is to attach the backplate to the motherboard. To do this, just simply align the backplate behind the motherboard and attach four washers to the four hex-head nuts and attach them to the backplate.
Once you get it installed you can then apply the included thermal grease.
The next step is to mount the retention plate to the heatsink. Since the retention plate is used for all Intel installations you have to align it to the correct position for the needed socket type. There are two screws on either side, and the best way to find out which way they go on is to line them up with the hex nuts you previously attached. Once you get them aligned, you can then attach them to the heatsink with the thumbscrew. This isn’t really the easiest to do with the fan/heatsink in the way, but at least it is possible.
You can then attach the cooler to the motherboard via the thumbscrews, which can also be fastened using a screwdriver (Phillips or flathead). Also make sure that the fan will blow over the heatsink, and then exit out towards the rear of the case as seen in the picture below.
The heatsink leaves minimal room towards the top of the case, at least for our installation and most likely other top-mounted motherboard cases.