The cooler installs really simple on both supported platforms (Socket 939/AM2(+) and LGA775). You won’t need to remove the mainboard from the system case. The cooler is pressed against the CPU with a metal clip screwed on to the base:
On Socket 939/AM2(+) this clip hold on to the hooks on the standard plastic frame, and on LGA775 platform you use the enclosed plastic frame with the locking plastic “spindles”. The cooler clip will be catching on the hooks on this frame. Everything seems to be plain and simple; however, I did have some problems with my DFI LANPARTY DK X48-T2RS mainboard. To be more exact, these were insurmountable obstacles. The thing is that the area around the processor socket on this mainboard is surrounded with heatsinks on the power components and chipset bridges connected with heatpipes to one another. That is why no matter how I turned the cooler, its retention loops would hit against one or even two heatsinks at a time, so they couldn’t really hook to the frame. Since I couldn’t really replace the mainboard, I installed Sunbeamtech Core-Contact Freezer using the retention from Thermalright Ultra-120 eXtreme cooler with a piece of dense rubber pad 40 x 40mm and 5mm thick. It turned out a pretty reliable retention. I even threw in a backplate for even greater hold, though it is originally not included with the cooler.
This is what it looks like inside the system case:
I would like to add that the distance from the cooler base to the lower heatsink plate is 37mm. I would also like to draw your attention to the unusual cooler positioning for the system case. In fact, our regular readers should know very well that coolers with heatpipe direct touch technology work better on quad-core 45nm processors is their heatpipes are turned along the socket lock (like shown on the photo above). If you turn the cooler by 90 degrees so that the airflow it creates goes towards the back of the system case, the CPU temperature will increase by 2~3°C. This, however, is not the case for dual-core and 65nm processors.