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Noctua NH-L9i-17xx

Noctua NH-L9i-17xx low-profile CPU cooler with NF-A9x14 fan, seen from above on a white background

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NH-L9i-17xx standard (Noctua brown), Intel LGA1700/LGA1851

Socket compatibility:
Intel LGA1851, LGA1700, LGA1954 (SecuFirm2 mounting)
Total height:
37 mm (23 mm heatsink + NF-A9x14 14mm fan); fits 2U racks
Footprint:
95 x 95 mm — 100% RAM and PCIe compatibility on mini-ITX

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Package details

Model: NH-L9i-17xx

brown/tan cooler and fan.

Condition:
Confirm new or reconditioned on the listing
Quantity:
Confirm package quantity on the listing
Included essentials:
NF-A9x14 HS-PWM fan, NA-RC7 Low-Noise Adaptor, NT-H1 thermal compound, SecuFirm2 mounting kit, screws for 92x92x25mm fans, Noctua case-badge

Important limit: Its compact size limits cooling capacity: Noctua itself says it is not suitable for CPUs with high heat loads

How many units?

Confirm condition, quantity and included accessories on the retailer’s listing.

Compare versions and packages

Specifications checked November 5, 2026. Full product details

Size and package

Size and placement

Dimensions with fan
95 x 95 x 37 mm (W x D x H)
Weight
415 g with fan (345 g without)

In the box

NF-A9x14 HS-PWM fan, NA-RC7 Low-Noise Adaptor, NT-H1 thermal compound, SecuFirm2 mounting kit, screws for 92x92x25mm fans, Noctua case-badge

Manufacturer specifications

Noctua NH-L9i-17xx Low-Profile CPU Cooler for Intel LGA1851/1700

A 37mm-tall low-profile air CPU cooler for Intel LGA1700/LGA1851 mini-ITX, HTPC and ultra-slim server builds, with Noctua's NF-A9x14 92mm PWM fan.

Which version should you buy?

Selected package: NH-L9i-17xx standard (Noctua brown), Intel LGA1700/LGA1851.

Color / finish

Compare finishes and availability below. Check model and edition differences before ordering.

  • NH-L9i-17xx, Noctua brownThis pageAvailability / details

    Model: NH-L9i-17xx

    brown/tan cooler and fan.

    Check price on Amazon
  • NH-L9i-17xx chromax.blackAvailability / details

    Model: NH-L9i-17xx chromax.black

    All-black version with the same 37mm dimensions and performance.

    Black-themed builds.

Related models and generations

These are different products. Check their specifications separately.

  • NH-L9i (LGA115x/LGA1200) Model: NH-L9i

    Older-Intel socket version of the same cooler.

    LGA115x/LGA1200 systems only.

  • NH-L9a-AM4 / NH-L9a-AM5 Model: NH-L9a-AM4

    AMD socket versions of the same 37mm cooler.

    AMD AM4/AM5 builds.

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

  • Noctua sells the same 37mm cooler in Intel LGA115x, LGA1700/1851, AM4 and AM5 versions: pick the one matching your socket.
  • The NH-L9i-17xx is a low-profile cooler for lower-heat CPUs; check Noctua's CPU compatibility list before buying it for a high-TDP chip.

Why people pick it

  • Only 37 mm tall, so it fits ultra-slim HTPC, 2U and SFF cases that full-height coolers can't
  • 95 x 95 mm footprint matches Intel's socket keep-out zone, giving full RAM and PCIe card clearance on mini-ITX
  • Very quiet at low speed, with an included Low-Noise Adaptor for near-silent fixed-speed operation
  • 6-year warranty and Noctua's SecuFirm2 mounting with a CPU compatibility database covering thousands of boards

Know before you buy

  • Its compact size limits cooling capacity: Noctua itself says it is not suitable for CPUs with high heat loads
  • Intel LGA1851/1700 only — AMD builds need the separate NH-L9a-AM4/AM5 variants
  • For full-size cases or higher-TDP CPUs, a taller cooler cools better at similar cost

Full specifications

Socket compatibilityIntel LGA1851, LGA1700, LGA1954 (SecuFirm2 mounting)
Total height37 mm (23 mm heatsink + NF-A9x14 14mm fan); fits 2U racks
Footprint95 x 95 mm — 100% RAM and PCIe compatibility on mini-ITX
Fan1x NF-A9x14 HS-PWM, 92 x 92 x 14 mm, 0–2500 rpm PWM
Fan airflow (max.)50.5 m³/h (29.72 CFM)
Fan noise (max.)23.6 dB(A)
Fan static pressure (max.)2.11 mm H₂O
Low-Noise AdaptorIncluded NA-RC7 (L.N.A.) for quieter fixed-speed operation
Heatpipes2x 6 mm copper, soldered to the fins; 54 fins
MaterialsCopper base and heatpipes, aluminium fins, all nickel-plated
Weight415 g with fan (345 g without)
Dimensions with fan95 x 95 x 37 mm (W x D x H)
Performance rating (Noctua NSPR)59 — not suitable for CPUs that create high heat loads; check Noctua's CPU compatibility list before purchase
ColourNoctua brown/tan
In the boxNF-A9x14 HS-PWM fan, NA-RC7 Low-Noise Adaptor, NT-H1 thermal compound, SecuFirm2 mounting kit, screws for 92x92x25mm fans, Noctua case-badge
Thermal compoundNT-H1 included
Optional accessoryNA-FD1 fan duct kit for further improved performance in low-clearance cases
Warranty6 years

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

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