There’s big CPU coolers, and then there’s really big CPU coolers. An enthusiast on the r/hardwaregore subreddit decided to see how well a relatively huge, eight-pound cylinder of copper might cool one of Intel’s Core i9 processors, and the results were actually pretty good, with idle and benchmarking temperatures reported as being around 35 and 80 degrees Celsius, respectively. That-Desktop-User, who shared their findings, say that they got the copper from a pricey medical machine and isn’t sure what its exact purpose is, but evidently, it functions pretty well as a passive cooler.