ASUS PRIME B850M-K AM5 Micro-ATX Motherboard

Description

Overview

The ASUS PRIME B850M-K is a compact micro‑ATX motherboard for AMD AM5 CPUs offering a practical balance of modern connectivity and upgrade options. Built on the AMD B850 chipset, the board supports Ryzen™ 7000, 8000 and 9000 series processors and provides DDR5 memory support across two DIMM slots for up to 128GB of RAM.

Key features

• Socket AM5 with AMD B850 chipset — suitable for Ryzen 7000/8000/9000 series CPUs (check ASUS CPU support list).
• Memory: 2× DDR5 DIMM slots (dual‑channel), up to 128GB and high OC memory support depending on CPU.
• Expansion: 1× PCIe 5.0 x16 primary slot, 1× PCIe 4.0 x16 (x4 lanes) and 1× PCIe x1 slot.
• Storage: 2× M.2 Key‑M slots (M.2_1 supports PCIe 5.0 x4 with compatible CPUs; M.2_2 supports PCIe 4.0 x4) plus 4× SATA 6Gb/s ports.
• Connectivity: Rear USB (including 2× 10Gbps Type‑A and 2× 5Gbps Type‑A), DisplayPort and HDMI outputs, Realtek 2.5Gb Ethernet and 7.1‑channel Realtek audio.
• Extras: M.2 heatsink, VRM heatsink, BIOS FlashBack button, addressable RGB headers and ASUS software suite (Armoury Crate, AI Advisor).

For best results consult the ASUS CPU/memory support lists and apply BIOS updates where required — some features (for example PCIe 5.0 M.2 speed and maximum memory overclock rates) depend on the CPU generation.