Part / accessory · Noctua

Noctua NH-L9a-AM4 low-profile cooler

verified 2026-10-13 Specs from Noctua specifications. Also known as: nh-l9a-am4, nh-l9a-am4 chromax.black.

Specs

typeair
height mm37
noteReplaces the AMD backplate, so it cannot be used on AM5. Not suitable for CPUs with high heat loads (Noctua).

Fits

  • cooler mount AM4-only cooler mounting with a custom backplate
    Coolers that require removing AMD's stock AM4 backplate and fitting their own; they work on AM4 only.

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Good to know
  • Noctua: the NH-L9a-AM4 and NM-AM4-L9aL9i require replacing the standard AMD backplate with a custom one, which isn't possible on AM5. Use the NH-L9a-AM5 (or the NM-AM5-L9aL9i kit) on AM5.

What does the Noctua NH-L9a-AM4 low-profile cooler work with?

8 models in the graph.

  • ASRock B550M Pro4 verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • ASUS PRIME B550M-A WIFI II verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • ASUS ROG STRIX B550-F GAMING (WI-FI) verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • GIGABYTE B550 AORUS ELITE AX V2 verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • GIGABYTE X570 AORUS ELITE (rev. 1.0) verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • MSI B450 TOMAHAWK MAX verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • MSI MAG B550 TOMAHAWK verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.
  • MSI MPG B550 GAMING PLUS verified
    Low-profile coolers that replace the stock AMD backplate (e.g. Noctua NH-L9a-AM4, NM-AM4-L9aL9i kit) fit AM4 but not AM5.

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