You have probably noticed there are a lot of AIO coolers on the market today. It seems like every other week a company is launching a new AIO unit, or a new company is bringing their first to market. Most of these units are built by watercooling systems manufacturer Asetek. Today we’re going to take a look at the Cooler Master Seidon 240M, this one is designed and built in house by Cooler Master…or is it? Follow along as we put this controversial cooler through it’s paces and find out what it can do.