"Antec has been in the business for a long time. In fact, they are celebrating their silver anniversary. That's right, Antec brings twenty-five years of experience to the table! With this sort of history, they know a good idea when they see one, and of course they saw what all the rage is in all-in-one water cooling loops. Corsair and CoolIt have made good amounts of money off of this concept, and now Antec figures it is time for their share of the market. I assume this is where the call went over to Asetek from Antec.
Pairing up with Asetek, the same manufacturer of the Corsair H50 and H70 coolers, Antec takes ideas from both and made a couple of changes. With the new line of KÜHLER coolers that hit the floor at CES, this was one that I know was in the plans at that time, but I can't recall if it was in the videos or not. Anyways, in the most basic sense, Antec took the head unit from the H70 and the radiator from the H50; got rid of the annoying tube covering, added a single fan, and are offering it up under their own label with the KÜHLER H2O 620 moniker."