Noctua has responded to the siren call for a more compact CPU cooler with its NH-U9S heatsink. It claims this mid-size cooler has "100% RAM compatibility" and "100% compatibility with PCIe cards on miniITX" motherboards. That's relatively easy to accomplish by sticking to the Intel/AMD thermal design guidelines, but how much thermal performance is sacrificed? Noctua's NH-U9S heatsink is an upgraded version of the NH-U9B, incorporating more heatpipes, a completely revamped fin geometry and a higher airflow Noctua NF-A9 fan. Noctua's NH-U9S mid-size heatsink is rated to heat loads of 140W TDP and installs onto AMD socket AM2/AM3/FM1/FM2 and Intel LGA2011-0/LGA2011-3/115x processors.