If you keep the 13900 at the stock power/turbo limits, the NH-D12L will be plenty.I have an i9-13900 incoming. This is the 65W version.
Is the Noctua NH-D12L good enough to cool this CPU well? I was considering the NH-D15S, but it's just so big and would make getting to the RAM a pain on my ITX board.
https://ncc.noctua.at/cpus/model/Core-i9-13900KS-Special-Edition-cpu-1652Never mind. Someone provided a helpful answer at Anandtech's forum: