The Ninja 5 pays special attention to silent operation without compromising performance. Included two Kaze Flex 120 (only 800RPM) fans as push-pull configuration makes Ninja 5 a great solution for silent PC. The award-winning Kaze Flex fans use Sealed Precision Fluid Dynamic Bearings for a long lifespan of 120,000 hours (MTTF). Massive heatsink and 6 sintered heat pipes provide top-tier performance, and cut-out fin design offers great compatibility for tall memory. THE New H.P.M.S. III mounting system offers secure and comprehensive compatibility for most popular sockets on the market.