The NH-L9a-AM4 chromax.black is a completely black version of Noctuas multi-award winning low-profile cooler NH-L9a-AM4, designed for AMD Ryzen-based HTPCs and Small Form Factor (SFF) systems. The recipe for success remains unchanged thanks to the same, super-flat heat sink and the proven NF-A9x14 PWM premium fan: Strong cooling performance and excellent smoothness with a height of just 37mm, coupled with 100% RAM and PCIe compatibility. The chromax.black version with its black fan and black-coated heat sink combines these advantages with a chic stealth design. The all-round high-quality complete package is completed by the renowned SecuFirm2™ mounting system for AMD AM4, Noctuas popular NT-H1 heat conductive paste – a real premium solution for demanding users who are looking for an ultra-compact cooler that looks just as good as it cools!Award-winning NH-L9a-AM4 coolertens of thousands of hardware enthusiasts around the world swear by the quality and performance of the NH-L9a-AM4. With recommendations from over 50 international hardware websites, it is considered one of the best low-profile coolers on the market.Chromax.black Designof the NH-L9a-AM4 Chromax.black is black from head to toe: With its black coated heat sink, black fans including black anti-vibration pads, black fan clamps and black mounting parts it is perfectly suitable for systems completely in black and also fits well with other color schemes.37mm installation heightThanks to the extremely low heat sink (23mm) and the 14mm slim NF-A9x14 fan, the total height of the NH-L9 is only 37mm. This makes the cooler ideal for compact HTPCs and small form factor housings, which offer very little space for CPU coolers.100% RAM compatibilityof the NH-L9a-AM4 has a compact base area, which fits exactly in the keepout zones specified by AMD. This means that neither the cooler nor the fan will exceed the RAM slots and thus a convenient access to the memory as well as full compatibility with high modules are guaranteed.100% compatibility with PCIe-cards on mini-ITXwith some AMD based mini-ITX mainboards the PCIe slot sits close to the CPU socket zone. While larger coolers that extend beyond this zone sometimes block the PCIe slot, the compact NH-L9a-AM4 offers full compatibility with PCIe cards.Easy access to sockets close to the baseMany low-profile coolers rely on larger fans and heat sinks to ensure sufficient cooling power, but they extend beyond the base zone and often make it difficult or even impossible to reach connections close to the base on densely populated ITX mainboards. With its compact footprint, the NH-L9a-AM4 offers convenient access to all connections and components.NF-A9x14 PWM Premium fanof the highly optimized NF-A9x14 Premium fan supports PWM for fully automatic speed control and uses innovative aerodynamic design measures as well as Noctuas AAO frame system. Thus the NH-L9a-AM4 remains remarkably quiet.Low-noise adapterwith the low-noise adapter (L.N.A.) the speed of the NF-A9x14 PWM fan can be reduced from 2500 to 1800rpm. Thus, almost silent systems can be realized with CPUs that have a low heat output.A tailor-made SecuFirm2™ mounting system for AM4of the NH-L9a is supplied with a customized SecuFirm2™ mounting system for the AM4 base of AMD's Ryzen platform, which guarantees an even easier installation by attaching the cooler from the back. Of course, the proven SecuFirm2™ quality remains unchanged.NT-H1 thermal compoundNoctua's renowned NT-H1 is a professional TIM solution that combines minimal thermal resistance with excellent ease of use and outstanding reliability. As a popular choice for overclockers and enthusiasts around the world, NT-H1 has become an established standard for premium thermal conductivity pastes.Soldering of heat pipes and cooling finsin many coolers are connected by a simple pressing procedure. Due to the thermal alternating load as well as the different expansion coefficients of copper and aluminum, this connection can loosen over the years, resulting in loss of performance. On the NH-L9a, cooling fins and heat pipes are soldered, which enables a better heat transfer over many years.This text is machine translated.