The SilverStone RM4A, is a 4U rackmount server chassis with high liquid cooling compatibility, specifically designed for professional users who demand high performance and reliability. Combining exceptional cooling performance with flexible expansion options, it perfectly meets the diverse and rigorous application needs of modern servers. The RM4A supports up to SSI-EEB motherboards and offers eight standard-size PCI/PCIe expansion slots, providing ample space to accommodate multiple graphics cards and various specialized cards. The chassis supports a 360mm liquid cooling radiator and can also be equipped with two 80mm rear fans, creating a dual cooling solution that significantly enhances heat dissipation and ensures stable operation even under long-term high loads. Its unique card retention bracket effectively secures graphics and expansion cards, preventing displacement or damage caused by long-term use or transportation, while also improving internal space utilization. Equipped with a convenient USB Type-C interface, it meets the latest high-speed data transfer needs, making daily use and maintenance more efficient and flexible. With outstanding cooling performance, versatile expansion capability, and professional-grade protection design, the RM4A not only meets current demands but also lays a solid foundation for future upgrades, making it an ideal choice for professionals building high-performance servers.