SilverStone RM4A 4U Rackmount Server Chassis

The SilverStone RM4A is a 4U rackmount server chassis designed for professional workstations, computing servers, and performance-focused systems requiring flexible cooling and expansion. Supporting SSI-EEB, SSI-CEB, E-ATX, ATX, Micro-ATX, and Mini-ITX motherboards, it accommodates a wide range of hardware configurations. Its durable steel construction and compact 446mm chassis depth make it suitable for professional rackmount installations. Featuring eight PCI expansion slots, front-mounted radiator support up to 360mm, and expansion card clearance of up to 424mm without front fans or radiators installed, the RM4A provides flexibility for demanding workstation and server builds. An included expansion card retainer helps secure installed graphics cards, while internal drive mounting options, front USB Type-C connectivity, and a chassis intrusion switch support practical system integration. Why Choose This SilverStone RM4A 4U Rackmount Server Chassis Supports SSI-EEB, SSI-CEB, E-ATX, ATX, Micro-ATX and Mini-ITX motherboards in a steel 4U chassis measuring 446mm deep. Provides eight expansion slots and an included card retainer. Cards can reach 424mm without front cooling hardware, with 113mm or 154mm width clearance depending on the retainer. Supports front 360mm, 240mm + 120mm, or three 120mm radiators, with three front 120mm and two rear 80mm fan mounting positions. Accommodates internal 3.5" and 2.5" drives, PS2 (ATX) power supplies up to 255mm, USB Type-C, two USB 3.0 ports and a chassis intrusion switch.