ASUS Prime B840M-A WiFi CSM – AM5 Micro-ATX Motherboard (WiFi Included)

Next-Gen Power. Compact Form. Commercial-Grade Stability.

Build your next system on a rock-solid foundation with the ASUS Prime B840M-A WiFi CSM – a compact yet powerful Micro-ATX motherboard designed for AMD’s latest AM5 processors. Whether you're building a business workstation , a future-ready home setup , or a budget-conscious gaming rig , this board delivers modern features, smart design, and enterprise-grade reliability.

Key Specifications:

CPU Socket: AM5 – Supports AMD Ryzen™ 8000/7000 Series processors

Chipset: AMD B840

Form Factor: Micro-ATX (24.4 x 24.4 cm) – perfect for compact builds

Memory Support:

4 x DDR5 DIMM slots

Supports up to 192GB DDR5, up to 6400+ MHz (OC)

Graphics Outputs: HDMI®, DisplayPort™ – for Ryzen APUs with integrated graphics

Expansion Slots:

1 x PCIe 4.0 x16

2 x PCIe 3.0 x1

Storage Options:

2 x M.2 PCIe 4.0 x4 (NVMe)

4 x SATA 6Gb/s ports

Networking:

WiFi 6 (802.11ax) + Bluetooth 5.2

Realtek 2.5Gb LAN

USB Connectivity:

Rear I/O: USB 3.2 Gen 2 Type-A & Type-C, USB 3.2 Gen 1, USB 2.0

Internal headers for front-panel USB

Audio: Realtek ALC897 7.1 HD Audio

CSM-Ready: ASUS Corporate Stable Model – long-term BIOS support, reliability, and IT-friendly deployment

Dimensions & Weight:

Size: 24.4 cm x 24.4 cm

Weight: ~1.0 kg

Why Go with the Prime B840M-A WiFi CSM?

AM5-Ready: Fully compatible with the latest Ryzen CPUs

WiFi 6 Built-In: No dongles, no clutter

CSM Support: Ideal for business environments needing consistent BIOS, software support, and lifecycle stability

Compact & Capable: Packs powerful features into a small footprint – ideal for small form factor builds

Easy DIY: Q-LED, BIOS Flashback, and ASUS Q-Design features make building stress-free

Perfect For:

Business-class PCs & workstation builds

Budget or mid-range AM5 gaming rigs

Compact but powerful home setups