The ASUS PRIME B840-PLUS WIFI-CSM is an AMD AM5 socket motherboard designed for Ryzen 9000, 8000, and 7000 series desktop processors. It features a micro-ATX form factor, supports up to 192GB of DDR5 memory, and includes Wi-Fi 6E and Bluetooth v5.3. It also has a 2.5Gb Ethernet port, multiple USB ports, and supports multiple storage options including 3 M.2 slots and 4 SATA 6Gb/s ports. The "CSM" in the name indicates it's part of ASUS's Corporate Stable Model program, offering long-term stability and support for businesses. The motherboard comes with a 3-year warranty.