When I think of Noctua I am reminded of their very large and powerful CPU coolers. These cooler have rivaled even some liquid cooling systems. Noctua knows cooling but these larger CPU coolers do not fit in all systems. That is why they have come up with the NH-U12S and NH-U14S which are guaranteed to fit in your system even if you have memory with larger heatspreaders. Today we are taking a look at Noctuas NH-U12S. This cooler features a tower design with aluminum fins and a copper base and heatpipes. There is a single 120 mm Noctua NF-F12 PWM fan and the cooler uses Noctuas SecurFirm2 mounting system for easy installation. Will this smaller cooler still provide the excellent cooling that we know Noctua for? Read on as we find out.