What's the difference between NH-D15 and NH-D15S? : Noctua Knowledge Centre
Oddly-Specific PSA: G.Skill's Trident Z memory fits under a Noctua NH-D14 just fine, even though it is not listed for compatibility due to it's 44mm height : r/pcmasterrace
Noctua NH-D15 Review | Play3r
Amazon.com: Noctua NH-D15S chromax.Black, Premium Dual-Tower CPU Cooler with NF-A15 PWM 140mm Fan (Black) : Electronics