The Noctua website says 59mm in single fan mode and 32mm in dual fan mode, but I don't know if that applies to ALL memory slots, or just the closest to the CPU.
32mm is pretty low, I think you might be restricted to JEDEC/OEM memory, without a heatsink, like Kingston value.
If you don't have this cooler yet, there are much cheaper coolers that would do the job and not have any, or have less height restriction.
In the review on hwbusters, the reviewer mentioned that the fan can be mounted higher up to give you more clearance.