Today, we are reviewing a 420 mm variant of an AIO cooler from the Arctic, Liquid Freezer II 420 ARGB. This time, it’s the biggest available version, and it will be checked on an AMD Ryzen 7900X and 13th-gen Intel i9 13900K (previously, it was i7 4790K and i9 9900K), so it’s an up-to-date setup.