Also, for everyone: would a 12 FPI or a 16 FPI rad cool better? What is the trade-off? From what I can see, a 16 FPI rad would cool better but requires higher fan speed?
Yes and no.
Higher FPI need higher static pressure (which usually requires higher fan speed).
It's simply more restrictive but also has more surface (more fins per inch) and therefore the capability to cool better (in case the required static pressure is provided).
If the fans can't provide the required static pressure a 16FPI will not cool better than a 12FPI radiator - it might actually cool worse.
But... 16FPI is still good for slim fans or normal fans with low rpm. 16FPI is still not a really high fin count.
Ps.: In one of my systems a
[email protected] all core and a 2080ti, both under full load, are easily being cooled by a 16FPI 360 + 16FPI 240 @ Noctua Redux @ 570 RPM.