So here we are again, with another uniquely designed water block. It sports a poly top, copper base, and half-inch fittings. But the real shocker lies within, using spiral springs to stir the water around for better turbulence and performance. The Dtek TC-4 Rev. 2 is a very impressive-looking piece of engineering. It is very easy to install, after removal of the motherboard, and sports ribs on the channel walls as better copper turbulators and for increased water-to-copper contact area.