Noctua NH-U9S and NH-D9L Rack Mount Compatible CPU Cooler Review @ HiTech Legion

While Noctua’s new NH-U9S and NH-D9L were designed to comply with rack mount system standards, their low profile and horizontal airflow make them a natural choice for SFF and HTPC systems where CPU cooler space is limited. The Noctua NH-U9S meets 4U standards at 125mm tall, while the NH-D9L takes it a step further to meet the 110mm requirement of 3U standard.