PSA. Probably most of you already know this but maybe someone doesn't: if you put a second fan on a NH-U14S for a push-pull configuration, use the thicker pads that are in
Noctua NH-U14S, Premium CPU Cooler with NF-A15 140mm Fan (Brown) - Newegg.com
Noctua NH-U14S TR4-SP3 Review for AMD EPYC and Threadripper