ASUS PRIME B840M-A CSM D5 WiFi Micro-ATX Motherboard | DDR5 | Built-In WiFi | Business-Class Reliability

Power & Performance

Equipped with an 8+2+1 digital power design featuring discrete MOSFETs, the board ensures stable power delivery and reliability—even under heavy workloads. The six-layer PCB adds further durability and allows for smoother voltage control and overclocking headroom. :contentReference[oaicite:1]{index=1}

Memory & Storage

The board supports 4 × DIMM slots of DDR5, maxing out at 256 GB and overclocked speeds up to 7600+ MT/s depending on CPU and memory used. :contentReference[oaicite:2]{index=2} It features three M.2 slots and four SATA 6 Gb/s ports, enabling flexible high-speed storage configurations. :contentReference[oaicite:3]{index=3}

Connectivity & Networking

With built-in WiFi 6E (2×2, 2.4/5/6 GHz) and a 2.5 Gb Ethernet port, this board is ready for high-speed wired and wireless networking. :contentReference[oaicite:4]{index=4} The rear I/O also includes USB Type-C and multiple high-speed USB ports, making it perfect for modern peripherals.

Expansion & Graphics

The PRIME B840M-A CSM supports a full-sized PCIe 4.0 x16 slot for graphics, alongside additional PCIe 3.0 x16 (x1 mode) slots for expansion cards. :contentReference[oaicite:5]{index=5}

Cooling & Build-Friendly Features

To keep things cool and reliable, the board includes enhanced VRM heatsinks, smart fan headers and support via ASUS Fan Xpert for automated tuning. :contentReference[oaicite:6]{index=6} For DIY ease, features such as the pre-mounted I/O shield and BIOS FlashBack™ streamline the build process.

Why Choose This Board?

If you’re building a compact yet powerful system on the AM5 platform, this motherboard offers a strong combination of future-proofing (DDR5, M.2 storage, WiFi 6E), business-class stability (CSM designation), and compact form (micro-ATX) without sacrificing features.

Suggested Use Cases

• Home workstation with fast storage and connectivity
• Mid-range gaming build aiming for AM5 socket compatibility
• Small form-factor PC where space is limited but features are essential

Final Thoughts

With its blend of high-end memory support, modern connectivity and a build-friendly design, the ASUS PRIME B840M-A CSM D5 WiFi is a smart choice for users seeking versatility in a micro-ATX form. Whether for work or play, it’s poised to deliver.