Swiftech uses a large "O" ring to seal the top and bottom halfs of the water block to ensure that there are no leaks in you expensive computer system. The MCW-Ramcool uses a simple flat plate interior design on the copper plate. There isn't any special machined channeling to assist in additional cooling, but seeing as video ram doesn't operate at extremely high temps anyhow, this should be more than enough to keep your ram cool, even at overclocked and volt modded settings.
The only water channeling Swiftech used on the MCW-Ramcool is on the top cover. There, they have molded to channels by the inlet and outlet barbs to ensure that the water flow fully covers the entire block, thus providing the best overall cooling performance for your video ram.
There are five threaded inserts pressed into the copper base that are used for mounting the water block to your video card, and on the inside of the block they also serve as alignment points for the top half to ensure that everything stays where it should while putting the block together. I found the memory contact pads to be flat and well finished and all four were level with each other when checked with a steel machinist rule.
Installation and testing...