As a beginning, I saw an i7 8700k and a noctua nh-d15s benchmark, the results were fantastic, the cooler was quiet even at high rpm speeds and during the CPU overclocking the temp was good ranging from the 40s/50s to 60°c, so it tends to beat a lot of liquid coolers and it's just $80 so it's very good for price to performance ratio, and these are the best things to get in an air cooler especially noctua. But, why we can't pick a noctua cooler with an i9 or a tr4 CPU since noctua coolers has got all these features?