http://www.techradar.com/news/best-cpu-coolers

You’ll want only the best CPU cooler for your self-built computer. Whether for work or gaming or anything in between, a processor can’t refrigerate itself. So without a proper cooler, your CPU will overheat and lead to the imminent destruction of your PC (or at least a central part of it). That’s why it’s integral to have only the best CPU cooler to mitigate these concerns.

Although some processors do come bundled with stock coolers, these primarily only include low- to mid-range processor from Intel and AMD. Both companies also don’t include coolers with their respective enthusiast-grade Intel Core X and AMD Ryzen Threadripper chips.