Heatsink Top:
With the fan removed we can see the fan shroud and interlocking copper fins below. These assemblies of fins have become really popular, and given that they also increase assembly speed, are probably part of the reason why copper heatsinks have come down in price to very reasonable levels. Each fin measures roughly 0.2mm thick, and is spaced 1mm apart.

Side A:
From the edge of the Evercool CUF-715 it's easy to see just how thin those copper fins are. The base of each fin is folded over 1mm to create the tab which is then soldered to the copper base. The copper base plate measures 6mm thick.

Side B:
The black aluminum fan support attaches directly to the copper base with four screws. The shroud doesn't appear to have been designed to direct fan exhaust back towards the outer fins of the heatsink. The copper fins are 31mm tall, and 70mm long. The clip requires a tool to use, and clips into the socket with all three tabs - always good to see that method used.

With the copper fins hanging over the small base plate 19mm on either side, I would have expected a little larger copper base plate. Though, given that this exact same heatsink is also used in a socket 478 configuration, this is of little surprise. The base has a pretty average sanded surface finish, which has left it very slightly curved. The dome is very slight, and I don't expect it to cause any real problems when mounted on a processor, but a little lapping couldn't hurt.