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Compact dual-tower CPU cooler with 92mm brown fan, 110mm tall, copper fins visible

Noctua

Noctua NH-D9DX i4 3U CPU cooler 92mm 110mm height

SKU CH-JY86-HB2YC MPN NH-D9DX i4 3U

Cools Intel Xeon LGA20xx CPUs in 3U chassis with a 110 mm dual-tower heatsink and 92 mm PWM fan

  • Fan size92 mm
  • Supported CPU socketsIntel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM & Narrow IL
  • Bearing designSSO2
  • Rotational speed2,000 RPM (Standard), 1,550 RPM (with L.N.A), 400 RPM (PWM)
  • Airflow rate46.44 CFM (Standard), 36.84 CFM (with L.N.A)
  • Operating noise22.8 dBA (Standard), 16.3 dBA (w/ L.N.A)
  • 3U-compliant 110mm height fits compact server cases
  • Dual-tower copper heatsink clears RAM and PCIe slots
  • NF-A9 92mm PWM fan with SSO2 bearing runs at 22.8 dBA
  • SecuFirm2 mounting supports Intel Xeon LGA2066 LGA2011-0 LGA2011-3 LGA1356 LGA1366
  • Includes NT-H1 thermal compound and Low-Noise Adaptor for quieter operation

Compact 3U cooler for Xeon servers

The Noctua NH-D9DX i4 3U is a 110 mm tall dual-tower air cooler built for Intel Xeon platforms using LGA2066, LGA2011-0, LGA2011-3, LGA1356 and LGA1366 sockets. Its 95 mm square footprint clears RAM and PCIe slots on current boards, making it suitable for rackmount workstations and quiet HTPC builds where vertical space is limited.

Replaces taller 4U coolers in 3U chassis

The 110 mm height is 15 mm lower than earlier 4U-compliant 9 cm DX coolers, allowing installation in 3U rack cases without sacrificing dual-tower surface area. Builders moving from bulkier heatsinks gain the clearance needed for low-profile DIMMs and full-length expansion cards while retaining SecuFirm2 mounting and NT-H1 thermal compound.

Sustained load runs at reduced fan speed

Under continuous thermal load the NF-A9 PWM fan operates between 400 and 2000 RPM, delivering 46.44 CFM at the standard 22.8 dBA level. With the supplied Low-Noise Adaptor the speed drops to 1550 RPM for 36.84 CFM at 16.3 dBA, keeping acoustic output low during extended render or compute sessions.

How it compares

Measured against everything we stock in CPU Coolers & Heatsink Fans, at today’s prices. Recalculated every night.

Price $48.99
Pricier than about 90% of the 1,559 comparable items (median $19.99).
Fan size 92 mm
Higher than about 70% of the 812 comparable items (median 80 mm).

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Specifications

Product
Brand nameNoctua
Model nameNH-D9DX i4 3U
Product typeFan & Heatsinks
Performance
Rotational speed2,000 RPM (Standard), 1,550 RPM (with L.N.A), 400 RPM (PWM)
Airflow rate46.44 CFM (Standard), 36.84 CFM (with L.N.A)
Size & build
Fan size92 mm
Bearing designSSO2
Cooler materialCopper
Fan mountingHorizontal
Heatsink dimensions95 × 95 × 110 mm
Product weight531g
Shipping weight1.07 kg
Package size178 × 178 × 157 mm
Compatibility
Supported CPU socketsIntel LGA2066, LGA2011-0 & LGA2011-3 (Square ILM & Narrow ILM), LGA1356, LGA1366 (with Xeon backplate)
CPU cooler height limit110 mm
In the box
In the boxNF-A9 PWM premium fan
Low-Noise Adaptor (L.N.A.)
NT-H1 high-grade thermal compound
SecuFirm2 Mounting Kit
Fan-clips for second NF-A9
Environment & compliance
Operating noise22.8 dBA (Standard), 16.3 dBA (w/ L.N.A)

Questions about this item

How much clearance does the 110mm tall NH-D9DX i4 need above the CPU socket in a 3U chassis?

The cooler stands 110mm high with a 95mm square footprint, so it fits the 3U height limit and clears RAM slots on LGA2011 Square ILM and LGA1356 boards.

Which SecuFirm2 mounting parts do I use for an LGA2011-3 Narrow ILM Xeon, and what common step is missed?

Use the Narrow ILM brackets and backplate from the SecuFirm2 kit; the step often missed is installing the Xeon-specific backplate before placing the motherboard in the case.

When should I replace the supplied NT-H1 thermal paste on this Xeon cooler?

Noctua rates NT-H1 for at least three years without re-application; replace it only if you remount the cooler or see rising temperatures after that period.

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