ASUS PRIME B550M-A/CSM

Overview

The ASUS PRIME B550M-A/CSM is a Micro-ATX motherboard designed to deliver reliable performance in a compact form factor. It supports AMD Ryzen processors from the 5000, 4000 G, and 3000 series, allowing you to build systems ranging from budget-friendly quad-core setups to high-thread-count workstations. With two M.2 slots utilizing PCIe 4.0 and four DIMM slots supporting up to 128 GB of DDR4 memory, this board ensures fast data access and smooth multitasking for gaming, content creation, or office productivity.

Key features

• Supports a wide range of AMD Ryzen processors, providing flexibility for different performance needs.
• Two M.2 slots with PCIe 4.0 bandwidth enable rapid storage access for faster game loading and file transfers.
• Four DIMM slots accommodate up to 128 GB of DDR4 memory, supporting demanding multitasking and applications.
• USB 3.2 Gen 2 ports deliver data transfer speeds up to 10 Gb per second, ideal for fast external drives and peripherals.
• Gigabit Ethernet ensures stable and responsive network connections for online gaming and streaming.
• Multiple display outputs (HDMI, DVI, VGA) offer versatile options to connect various monitors or projectors.
• Aura Sync RGB headers allow you to customize and synchronize lighting effects with compatible ASUS components.
• VRM and PCH heatsinks help maintain optimal temperatures during extended use, enhancing system stability.
• ASUS 5X Protection III design safeguards the motherboard against power surges, overcurrent, and other electrical hazards.

Key specs

• Form factor: Micro-ATX
• Chipset: AMD B550
• Processor support: AMD Ryzen 5000 series, 4000 G series, 3000 series
• Memory: 4 DIMM slots, up to 128 GB DDR4
• Storage: 2 M.2 slots with PCIe 4.0 support
• USB ports: USB 3.2 Gen 2 (10 Gb/s)
• Networking: Gigabit Ethernet
• Display outputs: HDMI, DVI, VGA
• Cooling: VRM and PCH heatsinks

Connectivity and compatibility

This motherboard offers a versatile set of connectivity options to fit various setups. The inclusion of HDMI, DVI, and VGA outputs means you can connect to modern digital displays or legacy monitors without extra adapters. USB 3.2 Gen 2 ports provide high-speed connections for external storage and peripherals, while Gigabit Ethernet supports reliable wired networking for work or gaming environments. The board’s compatibility with multiple AMD Ryzen processor generations makes it a flexible choice for upgrades or new builds.

Ideal uses and environments

The ASUS PRIME B550M-A/CSM fits well in compact PC builds where space is limited but performance cannot be compromised. It suits gamers who want a smaller tower without sacrificing processor power or storage speed. Content creators benefit from the fast M.2 storage and large memory capacity for editing and rendering tasks. Office users upgrading workstations will appreciate the stable networking and multiple display options. Its durable design and cooling features make it reliable for daily use in both home and professional settings.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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