The Arctic Liquid Freezer III 420 A-RGB has a radiator length of 458 mm, width of 138 mm, and thickness of 38 mm. The Thermaltake View 380 TG ARGB case supports graphics cards up to 415 mm in length and CPU coolers up to 160 mm in height, but the case specifications do not explicitly state the maximum radiator length supported. Given the radiator length of 458 mm exceeds the typical support for 420 mm radiators in many mid-tower cases, it is very likely that the Arctic Liquid Freezer III 420 A-RGB radiator is too large to fit inside the Thermaltake View 380 TG ARGB case. This explains why the cooler is too big for this case. There is no indication of a way to fit this specific 420 mm radiator in the case without modification or removal of other components.