Noctua NH-L9i is a low profile Intel CPU cooler that is around 35mm tall, perfect for compact HTPCs or any small cases. Its RAM is 100% compatible so there will be no problem with chipset coolers and no issue with RAM slots. It is also 100% compatible with PCIe cards on mini ITX. NF-A9x14 premium fan that offers Noctua’s proprietary AAO frame and aerodynamic design measures making the NH-L9i runs in near-silent operation. It can be installed much easier with its compatibility to mini-ITX boards.