Noctua NH-D9 DX-4677 4U LGA4677 CPU Cooler

This is the Noctua NH-D9 DX-4677 4U – a dual air cooler designed specifically for the LGA 4677 platform. It is aimed at more serious workstations and server systems in a 4U format, where you have limited space but high cooling requirements. With two 92 mm fans and compact dimensions of 95 x 120 x 134 mm, the cooler is designed to fit in tight configurations without interfering with surrounding components. Without RGB, in a typical silver and functional style, the focus here is on efficiency and reliability, not flashiness.

What you get is a massive but compact cooler with two 92 x 92 x 25 mm fans that operate in a push-pull configuration for better airflow over the radiator. With a total airflow of up to 56.68 CFM / 96.3 m³/h and noise levels of up to 30.6 dBA, the goal is stable cooling at controlled noise levels – critical for 24/7 machines. The 4-pin PWM connector gives you automatic speed control through the motherboard, so the fans ramp up only when the CPU is under load. The SSO2 Bearing is optimized for long life in continuous operation, which is important for server and professional systems. You also receive a complete mounting kit SecuFirm2 for LGA4677, as well as pre-applied thermal paste NT-H1, making the installation clear and clean.

• The cooler is specifically designed for CPU socket LGA 4677, ensuring proper pressure and compatibility with this platform.
• It uses air cooling with a dual cooler design, suitable for reliable and predictable operation under prolonged loads.
• The two included fans are 92 x 92 x 25 mm (2 pcs), providing a good balance between compactness and airflow.
• The total airflow is up to 56.68 CFM / 96.3 m³/h, sufficient to maintain stable temperatures under loaded CPUs in 4U cases.
• The maximum noise level of 30.6 dBA is reasonable for server and workstation environments, where the combination of cooling and acoustics is important.
• The fans have a 4-pin PWM connector, allowing dynamic speed control based on the processor temperature.
• The SSO2 Bearing is focused on long life and reliability during 24/7 operation, typical for professional systems.
• In the package, you receive 2 x NF-A9 HS-PWM fans, NA-YC1 4-pin PWM y-cable, NM-SMT5 Torx T30 tool, NT-H1 thermal paste (pre-applied), and SecuFirm2 mounting kit for LGA4677 for easy and secure installation.
• The compact dimensions of 95 x 120 x 134 mm facilitate integration into 4U chassis and densely populated motherboards with lots of RAM and expansion cards.

Who is this cooler suitable for? If you are building a workstation or server system on LGA 4677 in a 4U or other compact chassis and are looking for reliable air cooling without RGB and unnecessary effects, this is a very sensible choice. It is not for a classic home gaming build unless you specifically work with the LGA 4677 platform and value cooling in a 4U form factor.

The strongest aspect of the Noctua NH-D9 DX-4677 4U is the combination of precise compatibility with LGA 4677, quality NF-A9 fans, and a complete mounting kit that allows you to literally install it and forget about it in the long term.