The Noctua NH-L12Sx77 is a low-profile CPU cooler specifically designed for compact computer systems, offering optimal compatibility with small form factor cases thanks to its total height of 77 mm. This performance-enhanced model builds on the established NH-L12S design and features six heat pipes that provide improved thermal reserves for efficient heat dissipation. The airflow from bottom to top ensures optimal acoustics, as hot air is expelled directly from cramped spaces, making it particularly suitable for compact chassis. Equipped with a highly optimized NF-A12x15 flat 120 mm fan, this cooler includes a low-noise adapter and PWM support for automatic speed control, delivering full cooling performance under heavy loads while operating nearly silently during idle phases. The comprehensive mounting system supports Intel LGA1851, LGA1700, LGA1200, LGA115x sockets, as well as AMD AM5 and AM4 platforms, with an offset mounting option for maximum thermal efficiency. This cooler comes complete with high-quality NT-H2 thermal paste and the SecuFirm2 mounting system for easy installation. With its improved RAM and motherboard clearance, the NH-L12Sx77 represents a deluxe cooling solution for powerful small form factor and ITX systems, compatible with high-performance processors including Intel Core i9, i7, i5, i3 series and AMD Ryzen models. The combination of robust construction, advanced thermal technology, and thoughtful design considerations makes this cooler a reliable choice for users seeking effective thermal management in space-constrained computer environments without compromising on cooling performance or acoustic comfort.