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ASUS Prime B550M-A/CSM AMD AM4 (3rd Gen Ryzen) microATX commercial motherboard (PCIe 4.0, ECC memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K at 60HZ, TPM, ASUS Control Center Express) Powered by AMD 3rd Gen Ryzen processors, the ASUS Prime B550M-A/CSM commercial motherboard provides enhanced enterprise level features, including comprehensive system protection, 24/7 stability & reliability, an improved management suite with ASUS Control Center Express, ASUS Corporate Stable Model complimentary advance replacement, and a guaranteed long product life cycle for reliable sourcing and support, AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs, Fast Connectivity: 1Gb LAN, USB 3.2 Gen 2 Type-C & Type-A ports, a front panel USB 3.2 Gen 1 connector, plus HDMI 2.1, D-Sub, and DVI display outputs, First PCIe 4.0 CSM motherboard: ASUS Corporate Stable Model with up to 36-month supply, EOL notice, and ECN control. ASUS Control Center Express(ACCE) to make IT endpoint management simpler 5X Protection III: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O.