Just in time for today's launch of the new Arctic CPU water cooler, we took a close look at the 420mm AIO at OCinside.de! But not only the large radiator with three 140mm fans is new, also the mounting for AMD systems has been revised. What has been improved in detail on the Arctic Liquid Freezer II 420 Rev. 3 water cooler and of course a performance check including overclocking is presented in the following review.