Guru Hardware has just posted a review of the Danger Den TDX Water Block for Socket 478.
The block is made of a pure copper base, which is polished, and a clean-cut acrylic top. The O-ring that seals the top to the base is high quality and should last for a couple years. The intake/out connectors are easy to connect to 1/2" tubing. When the block is mounted, copper ridges are directioned over the core, and over that is a water accelerator nozzle all under the intake tube.
Full Review:
Danger Den TDX Water Block for Socket 478