Thanks Reddit as always. Noctua solution to fitting the NH-D15 into a case with high profile memory, remove one of the NF-A15 PWM fans and replace it with an NF-F12 PWM. Going
NH-D14
Noctua NH-D15 CPU Cooler Review - The King of Air Coolers | Technology X
Noctua NH-D15 chromax.black Review | Linuxlookup
Noctua cooler NH-D15 - How to get FREE fan clips from Noctua to add a 3rd FAN - YouTube
Noctua NH-D15 chromax.black Review | Linuxlookup
Noctua NH-D15 review (Page 3)
The Noctua NH-D15 CPU Cooler: Installation Guide for AMD's AM4 Platform - YouTube
The Noctua NH-D15 - Top Tier CPU Air Coolers Q3 2015: 9-Way Roundup Review
I replaced my Noctua NH-D15 stock NF-A15 fans with Chromax F12's and it is actually cooling my 5.1GHZ OC'd 9900KS better than the larger stock fans. Details in first post. : r/overclocking
NH-D15 Fan the Noctua NF-A15 Fan, Is it any good as a case fan? (Old Testing Method) - YouTube
Noctua NH-D15 - CPU fan - LDLC 3-year warranty
Moving rightmost fan on the NH-D15 to the left side of the left heatsink vs the NH-D15S : r/Noctua