The SSD Review The Worlds Dedicated SSD Education and Review Resource | 
Although there were previous entries in the field, Corsair’s Hydro Series H50 all-in-one sealed liquid cooling system was one of the first that actually worked, in the sense of being easy to install, reliable, and most importantly offering performance competitive with good air coolers while being quieter than most of them.
The H50 became very popular and spurred competition from other vendors.
The Corsair Hydro Series H70 improves upon the H50 design with a new pump and a much thicker radiator equipped with dual fans. It should offer significantly better performance than the H50, and Benchmark Reviews puts it to the test against a collection of air and water coolers to see how it compares.
Full story at Benchmark Reviews