ASUS Prime A520M-K CSM DDR4 AMD Motherboard

The ASUS Prime A520M-K CSM is a Micro-ATX motherboard built on the AMD A520 chipset, designed for use with AMD AM4 socket processors including Ryzen 5000 Series, 5000 G-Series, 4000 G-Series, 3000 Series, and 3000 G-Series desktop CPUs. Its compact mATX footprint (22.6 cm x 22.1 cm / 8.9 in x 8.7 in) makes it a versatile choice for space-conscious builds targeting home offices, small form-factor desktops, or corporate deployments. As a Corporate Stable Model (CSM) product, this board is backed by up to 36 months of product lifecycle support and a 6-month end-of-life notice, giving IT administrators and system integrators the lead time needed for smooth product transitions. Every purchase includes an ASUS Control Center Express activation key, enabling server-grade IT monitoring and remote management across a fleet of compatible systems. Memory support extends to two DDR4 DIMM slots with a maximum capacity of 64 GB. The board supports standard speeds from 2133 MHz through 3200 MHz and higher frequencies via overclocking profiles up to 4866 MHz (O.C.). Dual-channel architecture is supported, and ECC memory operation depends on the installed CPU. Storage connectivity comprises one M.2 Socket 3 slot (M-Key, types 2242/2260/2280) supporting both PCIe 3.0 x4 (up to 32 Gbps) and SATA modes, plus four SATA 6 Gb/s ports with RAID 0, 1, and 10 support. Display output is handled by one D-Sub and one HDMI 2.1 port (4K at 60 Hz) on the rear I/O. Networking is provided by a Realtek RTL8111H Gigabit Ethernet controller with ASUS LANGuard surge protection. Audio is handled by a Realtek ALC887/897 codec delivering 7.1-channel HD audio with up to 24-bit/192 kHz playback, audio shielding, and dedicated audio PCB layers. USB connectivity totals 12 ports: 6 on the rear panel (4 x USB 3.2 Gen 1 Type-A, 2 x USB 2.0) and 6 via internal headers (2 x USB 3.2 Gen 1, 4 x USB 2.0). The reinforced SafeSlot Core PCIe x16 slot offers enhanced retention and shearing resistance compared to standard slots. A UEFI BIOS with EZ and Advanced modes, Fan Xpert fan control, and ASUS 5X Protection III round out the feature set. Key Specifications: – Chipset: AMD A520 – Socket: AMD AM4 – Form Factor: mATX (22.6 cm x 22.1 cm) – Memory: 2 x DDR4 DIMM, max 64 GB, dual-channel, up to 4866 MHz (O.C.) – Storage: 1 x M.2 PCIe 3.0 x4 / SATA (2242/2260/2280); 4 x SATA 6 Gb/s; RAID 0/1/10 – Display: 1 x D-Sub, 1 x HDMI 2.1 (4K@60Hz) – LAN: Realtek RTL8111H 1 Gb Ethernet – Audio: Realtek ALC887/897, 7.1-channel HD, 24-bit/192 kHz – USB: 4 x USB 3.2 Gen 1 + 2 x USB 2.0 (rear); 2 x USB 3.2 Gen 1 + 4 x USB 2.0 (internal headers) – Expansion: 1 x PCIe 3.0 x16, 2 x PCIe 3.0 x1 – BIOS: 256 Mb Flash ROM, UEFI AMI BIOS – Warranty: 3 Years – CSM Lifecycle: Up to 36 months with 6-month end-of-life notice