The NH-U9B SE2 includes Noctua's SecuFirm2 multisocket mounting system which allows this cooler to work with numerous socket configurations including: LGA1366, LGA1156, LGA775, AM2, AM2+ and AM3. Noctua built this CPU cooler around their highly regarded NH-U9 series of compact coolers. They also provide two 92mm NF-B9 fans with included Low-Noise and Ultra-Low-Noise-Adaptors. According to Noctua the two fans are designed to work best in a push-pull arrangement. Plus Noctua warranties this cooler for six years.