Notice in the above picture where the heatsink rests on the cpu. As you can see the cpu does not hit the center of the copper core nor is it even close. However just the edges miss it but does that effect the cooling ability? It would seem if the core would be more centered on the cpu it'd do a better job. I'd think anyway. Minor design flaw perhaps.

One thing that sets off the Dr Thermal heatsinks is their unique design. As you can see it has 16 fins on two sides and 11 on the other two sides. The part covering the actual cpu is less than an inch in diamater and that allows cool air to blow through the fins and actually hit the cpu and therefore assisting with cooling. Think about it, those heatsinks that have just a big flat bottom have no air blowing on the cpu. Then factor in that copper core. It's the thickness of the heatsink which is an inch tall and just over 3/4 inch in diamater, all solid copper. Surrounding the one-inch tall copper core is the uniquely designed aluminum fin heatsink. Copper obsorbs heat better than aluminum while the aluminum(which releases heat quicker) helps to release the heat quicker from that copper core with obvious help from the 36cfm fan. In theory

Now about how the Dr Thermal attaches to the motherboard. It uses a clip mechanism which uses a unique tension bar(see above pic) which applies pressure AFTER you install the heatsink, similar to a motherboard's ZIF socket. You attache the heatsink with the side bar up, connect the clips over the motherboard catches and then move the side bar down into place and that provides the tension making the fit very secure. A small screwdriver may be needed to get the front clip over the motherboard catch, but it takes very little effort. In other words the install is a peace of cake. To remove the heatsink just move the side bar back upright to release the tension and un-hook the clips.