The Ninja 5 Rev.B pays special attention to silent operation without compromising performance. Included two Kaze Flex 120 (only 800RPM) fans as push-pull configuration makes Ninja 5 Rev.B 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. IV mounting system offers secure and easy-to-install experience for Intel LGA 1700 Socket users. 
 
Top-tier Cooling
Massive heatsink and 6 sintered heatpipes provide top-tier performance and potential for fanless solution for completely silent PC.
 
Memory
Compatibility
Cut-out fin design improves memory compatibility allowing installation of tall memory heatsink up to 55 mm in height, even for LGA2011(V3)/ LGA 2066 motherboards where RMA are on both side of socket.

Note: Fan would be lift up with tall memory heatsink