Part / accessory · Noctua

Noctua NH-L9i-17xx low-profile cooler

verified 2026-10-13 Specs from Noctua specifications. Also known as: nh-l9i-17xx, nh-l9i-17xx chromax.black.

Specs

type	air
height mm	37
note	Must not be used on LGA115x/LGA1200 (Noctua). Not suitable for CPUs with high heat loads.

cooler mount Intel LGA1851 cooler mounting
CPU cooler mounting on LGA1851 (Core Ultra 200S) boards; mounting holes are in the same positions as LGA1700.
cooler mount Intel LGA1700 cooler mounting
CPU cooler mounting on LGA1700 (12th-14th Gen) boards; different hole spacing and stack-up height from LGA1200/115x.

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Connect the Tethered Trust MCP server and ask: "Will the Noctua NH-L9i-17xx low-profile cooler work with my device?"

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Good to know

Intel: LGA1700 and LGA1851 mounting holes are in the same locations, so LGA1700 thermal solutions fit LGA1851 without modification. Intel says this covers mounting only; confirm thermal/power suitability with the cooler maker.
Noctua: all LGA1700-compatible Noctua coolers and mounting kits are also compatible with LGA1851.
Optional offset mounting (e.g. Noctua NM-IMB8 bars listed for the NH-D15 G2 on Core Ultra 9 285K / 7 265K) is a performance accessory, not required for fitment.
Coolers designed for LGA1200/115x do not fit without LGA1700 hardware. Noctua sends free NM-i17xx-MP83 / NM-i17xx-MP78 upgrade kits (by mounting pitch); Corsair sells the CW-8960091 LGA1700 Retrofit Kit for coolers such as the H150i RGB PRO XT.
Noctua: the original NH-L9i cannot be used on LGA1700/LGA1851 (it would sit too low); use the NH-L9i-17xx instead. The NH-L9i-17xx must not be used on LGA115x/LGA1200.
To check a Noctua cooler: if the box specs mention LGA1700, or the Intel parts include the NM-IBP4 backplate, LGA1700/LGA1851 parts are included.

15 models in the graph.

Informational only. Confirm with the manufacturer before buying or installing. Spotted a mistake? Report it.