ASUS PRIME A520M-K mATX Motherboard (AMD A520, AM4)

Description

Overview

The ASUS PRIME A520M-K is a micro‑ATX (mATX) motherboard built around the AMD A520 chipset and the AM4 CPU socket. It targets compact desktop and entry‑level systems where reliable everyday performance, M.2 storage and basic modern connectivity are required. The board supports AMD Ryzen 5000 Series, 5000 G‑Series, 4000 G‑Series and 3000 Series desktop processors (see ASUS CPU support list for exact models and BIOS requirements). ([asus.com](https://www.asus.com/us/Motherboards-Components/Motherboards/PRIME/PRIME-A520M-K/techspec/))

Key features

• CPU socket: AMD AM4 (supports Ryzen 5000/5000 G/4000 G/3000 series — check ASUS support list and BIOS notes).
• Memory: 2 × DDR4 DIMM slots, up to 64GB, dual channel (supports a wide range of DDR4 speeds, including 3200MHz and multiple OC profiles).
• Storage: 1 × M.2 (Key M) supporting PCIe 3.0 x4 and SATA modes (2242/2260/2280), plus 4 × SATA 6Gb/s ports (RAID 0/1/10 supported via chipset).
• Expansion & graphics: 1 × PCIe 3.0 x16 (x16 mode) and 2 × PCIe 3.0 x1; onboard video outputs: HDMI 2.1 (4K@60) and D‑Sub for APUs with integrated graphics.
• Networking & audio: Realtek RTL8111H Gigabit LAN and Realtek 7.1 HD audio codec with shielded audio PCB features.
• Rear I/O: 4 × USB 3.2 Gen 1 Type‑A, 2 × USB 2.0, HDMI, D‑Sub, PS/2 combo, Gigabit LAN and 3 audio jacks.

The board includes ASUS 5X Protection III hardware safeguards and basic ASUS utilities such as Armoury Crate and AI Suite 3. Accessories in the box typically include 2 × SATA cables, an I/O shield, an M.2 screw pack, support DVD and the user manual. ([asus.com](https://www.asus.com/us/Motherboards-Components/Motherboards/PRIME/PRIME-A520M-K/techspec/))

Form factor dimensions: mATX — approximately 22.6 cm × 22.1 cm. Supported operating systems include Windows 10 and Windows 11 64‑bit. For exact CPU compatibility and BIOS versions required for specific Ryzen models, consult ASUS’s official CPU support list before purchase. ([asus.com](https://www.asus.com/us/Motherboards-Components/Motherboards/PRIME/PRIME-A520M-K/techspec/))