Air cooler Noctua NH-D9 DX-4677 4U 9.2 cm 400-2500 RPM SSO Bearing Beige Brown

The Noctua NH-D9 DX-4677 4U is a low-profile air cooler developed for Intel LGA4677 Xeon processors in 4U and other space-constrained systems. It is based on Noctua’s 92 mm NH-D9L heatsink design and comes with two PWM-controlled NF-A9 92 mm fans (high-efficiency 2500 rpm version), a SecuFirm2™ mounting system and pre-applied NT-H1 thermal compound. The cooler measures 95 mm × 120 mm × 134 mm and uses an aluminum heatsink with a beige-brown aesthetic suitable for rack and workstation builds.

Advantages

The NH-D9 DX-4677 4U delivers a balance of cooling performance and compatibility for 4U chassis thanks to its compact 92 mm dual-fan configuration and a larger, custom-designed contact surface for LGA4677 CPUs. Its PWM-controlled high-efficiency NF-A9 fans provide a wide speed range (400–2500 RPM) for adjustable cooling and quiet operation, and the included SecuFirm2™ mounting and pre-applied NT-H1 paste simplify installation and ensure reliable thermal contact.

Suitable for

• 4U rackmount servers and workstations with Intel LGA4677 sockets
• Space-restricted systems where low-profile CPU coolers are required
• Enclosures that exhaust airflow perpendicular to the socket’s long axis

Key specifications

• Type: Air cooler
• Model: Noctua NH-D9 DX-4677 4U
• Fan diameter: 92 mm (two NF-A9 PWM fans, 400–2500 RPM)
• Bearing type: SSO (self-stabilizing oil-pressure bearing)
• Dimensions (W×D×H): 95 × 120 × 134 mm
• Weight: 0.769 kg
• Compatibility: Intel LGA4677
• Color/material: Beige, brown, aluminium

How to use

Install the cooler using the included SecuFirm2™ mounting system following the manufacturer’s mounting instructions for LGA4677. Remove protective covers, place the cooler onto the CPU so the custom contact surface seats evenly, and secure the mounting hardware evenly in the recommended sequence. Connect the fan headers to motherboard PWM fan headers so the NF-A9 fans are controlled automatically. Ensure there is sufficient chassis airflow in the intended direction (perpendicular to the socket long axis) for optimal performance.

Recommendations

For systems that require airflow parallel to the socket’s long axis, select a cooler model designed for that orientation. Verify clearance in your 4U chassis before installation and ensure chassis exhaust fans support the cooler’s intended airflow direction.