 Dami nagtatanoong kung kasya ba yung CPU air cooler? Don't be like this guy, nabumilan ng cooler without checking, tapos hindi pala kasya sa case. First, get the height of the CPU cooler with fan. Most manufacturers have that spec on their site. Or yung ibang shops na matalino, kasama na yan sa item details. Anong shop ba to? Next, go to the page of the case you want to buy. Anapin mo yung specs. Usually, you need to scroll all the way down past the pretty pictures. Look for the max CPU cooler height. The CPU cooler should be shorter. Personally, I prefer an allowance of around 3mm at least. So like itong Corsair 4000D, max CPU cooler height niya is 170mm. I would get a cooler that is max height of 167mm. Note after the height, you also need to check RAM clearance. Kung babanggaba yung cooler or yung fan ng cooler sa top ng RAM mo. This is not always a problem though as it depends on the size of the cooler and you can sometimes move the fan around. Pero kung nagkamali ka sa cooler height, kong grats, nag-upgrade ka na sa open air sit.