The latest rage in CPU cooling seems to be the self-contained water cooler because of the cooling potential of these coolers without the noise of a comparable air-based cooling system. This is something that cooling enthusiasts have known for years with the custom water cooling solution heat dissipation capacity only rivaled by its varied composition. A typical custom water loop is comprised of a pump, CPU cooling block, and a radiator in its simplest form.
The thickness of the heat sink and the density of the heat sink have an effect on the cooling efficiency of the cooling circuit.
A thicker radiator can handle more coolant as well as spreading the coolant over a larger surface volume for cooling capacity, while a higher fin density allow for more effective heat dissipation via the cooling fans. However, there are negatives of each. A thicker radiator can inhibit coolant flow speed because of its larger capacity and and surface volume. On the other hand, higher fin density requires a higher CFM rated fan to effectively pass air through the radiator effectively.