Case fan. PWM for 743 chassis. 80 x 25 mm. 4 Pin. The brand Supermicro. Supermicro designs, develops, and manufactures optimized server solutions based on the x86 architecture. The company's wide product range includes the industry's most extensive selection of server, high-end workstation, and storage systems, as well as energy-efficient server components, known as Server Building Blocks Solutions, which include server boards, chassis, and power supplies. Additionally, Supermicro offers powerful Universal I/O (UIO) expansion card technology and other system accessories. A strong emphasis is always placed on energy efficiency to provide effective solutions optimized for a wide range of customer applications.