Skip to main contentSkip to footer
Slide 1 of 4

Overview

The MSI MPG B550 Gaming Plus provides a stable, high-performance foundation for custom PC builds. Built on the AMD AM4 socket, this full-sized ATX motherboard supports 3rd Gen AMD Ryzen processors and offers the thermal management and speed required for demanding gaming setups and heavy workloads.
Open Box

Open Box - MSI MPG B550 Gaming Plus Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, ATX)

Model: MPG B550 GAMING PLUS
Web Code: 20185586
Sold and shipped by | 4.4 seller rating (490 reviews)

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

Read return policy

Warranty Information

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

PCIe 4.0 Support: Features Lightning Gen 4 PCIe and M.2 slots, reaching transfer bandwidths up to 64 GB/s for high-speed graphics cards and ultra-fast NVMe SSDs.

Thermal Management: Keeps temperatures low under load using an Extended Heatsink, 7W/mK choke thermal pads, a 2oz copper PCB, and M.2 Shield Frozr to prevent thermal throttling.

Memory & Expansion: Holds up to 128 GB of dual-channel DDR4 memory across 4 DIMM slots, supporting overclocked speeds up to 4400+ MHz. Steel Armor PCI-E slots provide extra structural support for multi-GPU configurations, including 2-Way AMD CrossFire.

Modern Connectivity: Equipped with reversible USB 3.2 Gen 2 Type-C ports for both front-panel chassis headers and rear I/O, along with Gigabit LAN, HDMI, and DisplayPort video outputs.

Pre-Installed I/O Shielding: Protects against electrostatic discharge (ESD) and simplifies the installation process during assembly.

Mystic Light RGB: Offers customizable onboard lighting with 16.8 million colors and 29 dynamic effects controlled via the Mystic Light software.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping may be available on orders over a minimum amount (before taxes, fees, and promo codes). Shipping charges may vary based on item size and your shipping address. Want a shipping charge estimate? Simply add an item to your cart, then access the cart and enter your postal code in the shipping estimate section.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Computer components
Return/Exchange Period
30 days
Condition
Unopened

We can only acceept returns that are in their original packaging and do recommend customers check manufacturer's warranties for exclusions.

Learn more about returning a Marketplace product