Technically, FPI is 'folds per inch', because the radiator fins are actually folded copper or aluminum soldered between the radiator tubes, like an accordion, not individual 'fins'. However, both are generally accepted when discussing liquid cooling radiators.FPI = FINS PER INCH NOT FOLDS PER INCH
Also, for normalized noise results - not all coolers reach normalized 40dB at load. I just tested a cooler that even at full fan speeds registered just barely over 30dB. Noise level is a byproduct of cooling performance; both pump and fan RPM, both of which are easily controlled by the end user, typically by fan curves, not decibels.Is it me missing something or Tom's team is not including normalized noise results ?
i mean chose some level of noise around 40db and test how good the coolers compare at this noise level. much more important in day to day usage than 50 and 100 percent of completely different fans.