Noctua, a distinguished CPU cooler manufacturer, has showcased the remarkable cooling performance of its advanced NH-U14S DX-4677 cooler.
In an open system, the cooler effectively cooled an Intel Xeon W9-3495X with a power consumption of 700 watts—an extraordinary feat for an air cooler—though the temperature reached the specified limit of 99°C.
In a brief video shared on Twitter, Noctua displayed the functionality of the CPU cooler with the Intel Xeon W9-3495X, addressing the question, "Is 700W with air cooling impossible?" The video features a monitoring tool confirming the operation at just above 700 watts. Noctua's test system incorporated components such as an Asus Pro WS W790E-SAGE SE motherboard, SK Hynix DDR5 EC8 RDIMM RAM, and a Seasonic PX-1600 power supply.
Although the video omits temperature readings, Noctua clarifies in the comments that the ambient temperature was approximately 20°C and the CPU was functioning at Intel's temperature limit of 99°C—the threshold for throttling. The high-end cooler was engineered with a large copper contact area for effective heat dissipation and dual 140mm fans. The cooler stands 165mm tall and weighs 1.1 kg. The video demonstrates the cooler's ability to sustain the Intel Xeon W9-3495X at 700 watts consistently. Noctua contends that other coolers would not achieve this wattage and would already operate at the temperature limit with fewer watts. However, this is not an independent comparison.
In a more typical scenario involving 450 watts of power consumption, the CPU temperature remained within the 55°C range. Notably, an Intel Xeon W9-3495X was operated at nearly 2,000 watts a month ago, breaking new world records in Cinebench R23. This extreme overclocking, however, necessitated liquid nitrogen cooling.
The Noctua NH-U14S DX-4677 cooler is priced at approximately $100
Watch that video here.