NOCTUA NH-U14S DX-3647 Premium Single Tower CPU Air Cooler ( Brown )

The Noctua NH-U14S DX-3647 is a premium single-tower CPU air cooler engineered specifically for Intel Xeon processors on the LGA3647 socket. It is a member of Noctua's DX line, which is purpose-built for workstation and server platforms where reliable, low-noise thermal management is critical. At the heart of the design is a custom-engineered contact surface that accommodates both square-ILM and narrow-ILM LGA3647-0 platform variants, ensuring broad compatibility across Intel Xeon Scalable (Platinum, Gold, Silver, and Bronze — Skylake-SP / Purley) and Xeon Phi (Knights Landing, Knights Mill) platforms. The heatsink draws on the proven 140 mm NH-U14S form factor and is constructed with a copper base and six copper heat pipes, aluminium cooling fins, soldered joints, and nickel plating for long-term durability and efficient heat transfer. Cooling airflow is delivered by Noctua's NF-A15 140 mm fan, which is connected via a 4-pin PWM connector operating at 12 V. PWM control allows the motherboard to regulate fan speed automatically — keeping the system near-silent at idle and ramping up to a maximum rotational speed of 2,000 RPM under sustained load. Noise output is rated at 22.6 dB(A), making this cooler well suited to noise-sensitive environments such as audio and video production suites, engineering labs, and professional workstations. Installation is simplified by Noctua's SecuFirm2 mounting system, which includes the necessary processor clips for LGA3647 platforms. NT-H1 thermal compound comes pre-applied, so the unit can be fitted and operational without additional materials. The cooler's physical footprint measures 6.5 in (L) × 5.91 in (W) × 2.05 in (H), which is compact relative to its thermal class and generally compatible with standard server chassis clearances — though case fitment should always be verified before purchase. Noctua backs this cooler with a 6-year manufacturer's warranty, reflecting the brand's commitment to build quality and long operational life in demanding workstation and server deployments. — Verified Specifications — • Socket compatibility: Intel LGA3647 (square ILM and narrow ILM) • Fan model: NF-A15, 140 mm, 4-pin PWM • Fan voltage: 12 V • Maximum fan speed: 2,000 RPM • Noise level: 22.6 dB(A) • Heat pipes: 6 (copper) • Materials: Copper base and heat pipes; aluminium fins; soldered joints; nickel plating • Dimensions: 6.5 in L × 5.91 in W × 2.05 in H • Thermal compound: NT-H1 (pre-applied) • Mounting system: SecuFirm2 • Warranty: 6 years