Noctua NH-D15S & NH-U9S chromax.black CPU Coolers Review

 As with all chromax.black CPU air coolers both the NH-D15S and the NH-U9S are basically black color versions (black powder coating) of the normal models and so once again the NH-D15S is a dual-tower type that ships with a single NF-A15 150mm HS-PWM fan (1500RPM/82.51CFM/24.6dBA) mounted between the two heatsinks (sandwich design) whereas the NH-U9S is a single tower type which gets shipped with a single 95mm NF-A9 PWM fan (2000RPM/46.43CFM/22.8dBA).