The Noctua NH-U12S DX-4677 is a high-performance 120mm CPU cooler built specifically for Intel’s LGA4677 Xeon platform (Sapphire Rapids). With its dual mounting support for both Square ILM and Narrow ILM, the NH-U12S DX-4677 delivers exceptional thermal performance in 4U and compact workstation/server environments, all while maintaining low acoustic profiles. Leveraging Noctua’s proven U-series heatsink and a pre-installed NF-A12x25 fan, it combines industrial cooling standards with whisper-quiet operation.

Key Features:

Designed exclusively for Intel LGA4677 (Xeon Sapphire Rapids)

Includes mounting hardware for both Square ILM and Narrow ILM sockets

Slim single-tower heatsink design for 100% RAM clearance

Pre-installed NF-A12x25 PWM fan for balanced airflow and low noise

SecuFirm2™ mounting system optimized for secure server-grade reliability

Specifications:

• Socket Support: Intel LGA4677 (Square ILM & Narrow ILM)

• Dimensions (with fan): 158 x 125 x 71 mm (H x W x D)

• Fan: 1 × NF-A12x25 PWM (120mm)

• Fan Speed: 450 – 2000 RPM

• Max Airflow: 102.1 m³/h

• Max Acoustics: 22.6 dB(A)

• Static Pressure: 2.34 mm H₂O

• Heatsink Material: Copper base & heatpipes, aluminum fins, soldered joints

• Bearing: SSO2

• MTTF: >150,000 hours

• Weight: ~870 g (with fan)

Additional Features:

• Designed for use in 4U racks and high-density workstations

• Precision-machined contact surface for Xeon’s large IHS

• Optional second fan support for push/pull configuration

• Reliable long-term performance under sustained server workloads

Customer Benefits:
Engineered to meet mission-critical thermal demands with minimum acoustic impact, the NH-U12S DX-4677 is perfect for quiet server rooms, workstations, and research systems where performance, space, and silence must coexist.

What’s in the Box:

• 1 × NH-U12S DX-4677 heatsink

• 1 × NF-A12x25 PWM fan (pre-mounted)

• Square & Narrow ILM mounting hardware

• NT-H1 thermal paste

• Torx® T20 installation tool

• Illustrated manual

Compliance:
Manufactured under CE, RoHS, and REACH standards. Designed in Austria for high-reliability IT environments, server deployments, and professional computing.

Manufacturer Contact:
Company Name: Noctua GmbH
Address: Josef-Preis-Allee 18, 8020 Graz, Austria
Email: support(at)noctua(dot)at