Noctua NH‑L12Sx77 – 77mm Low Profile CPU Cooler, 6 Heatpipes, NF‑A12x15 PWM Fan

Noctua NH‑L12Sx77 Low Profile CPU Cooler

The Noctua NH‑L12Sx77 is a performance‑enhanced, low‑profile CPU cooler designed for compact systems that demand strong cooling in tight spaces. With 6 heatpipes, a 77mm total height, and Noctua’s premium NF‑A12x15 PWM slim 120mm fan, it delivers significantly better thermal performance than the original NH‑L12S — ideal for high‑end CPUs running aggressive boost modes in SFF builds.

Thanks to its taller fin stack and redesigned layout, the NH‑L12Sx77 offers improved RAM clearance (44mm), better motherboard compatibility, and optimised airflow direction for cases with top ventilation such as the Fractal Terra, Louqe Raw S1, and SilverStone Milo series.

Specifications

Brand: Noctua
Model: NH‑L12Sx77
Cooler Type: Low‑profile air cooler
Height: 77mm
Heatpipes: 6
Fan: NF‑A12x15 PWM (120mm slim)
Fan Speed: 1850 RPM max (1400 RPM with LNA)
Bearing: SSO2
Airflow: Premium slim‑fan performance
Noise: Virtually silent at idle
Socket Support:
Intel: LGA1851, LGA1700, LGA1200, LGA115x
AMD: AM5, AM4
RAM Clearance: 44mm (56mm in high‑clearance mode)
Thermal Compound: NT‑H2 included
Mounting System: SecuFirm2™ multi‑socket
Warranty: 6 Years

Key Features
Performance‑enhanced version of the NH‑L12S
Taller 77mm design for improved cooling
6 heat pipes for higher thermal headroom
NF‑A12x15 slim 120mm PWM fan
44mm RAM clearance (56mm with fan on top)
Exhaust‑up airflow ideal for perforated top panels
Perfect fit for Fractal Terra, Louqe Raw S1, SilverStone ML12
Supports 120×25mm fans (height increases to 102mm)
AM5 offset mounting option for lower temps
NT‑H2 next‑gen thermal paste included
Soldered fin‑to‑heatpipe interface for long‑term reliability

Most Suitable For
Small Form Factor (SFF) PCs
Mini‑ITX builds
Fractal Terra / Louqe Raw S1
HTPC systems
Compact workstations
High‑end AM5/Intel CPUs in tight cases