This article covers MSI B450 GAMING PLUS MAX（ソケットAM4.

Overview

The MSI B450 GAMING PLUS MAX is an ATX motherboard built around the AMD B450 chipset with a Socket AM4 layout. It supports a broad range of Ryzen processors, offers four DDR4 memory slots, and includes one M.2 slot for high-speed storage. Launched in 2019, this board was designed for gamers who wanted a dependable and affordable foundation for a mid-range Ryzen PC. As part of MSI's GAMING series, the B450 GAMING PLUS MAX uses a black-and-red design and focuses on practical essentials: six SATA ports, a reinforced primary PCIe x16 slot, and a rear I/O panel with USB 3.2 Gen 2 Type-A and Type-C connectors. The MAX revision matters because it ships with a larger BIOS chip and better out-of-the-box support for Ryzen 3000 processors than earlier B450 boards. In 2026, this board still makes sense for a budget 1080p gaming build, especially if you already own AM4 parts or DDR4 memory. It is not a high-end platform, and the lack of PCIe 4.0 and DDR5 means it is best reserved for buyers who want a low-cost route into the AM4 ecosystem rather than a future-proof flagship.

Compatibility Guide

The board uses Socket AM4, so it accepts most AMD Ryzen desktop CPUs from the first through third generation without much fuss. Many Ryzen 5000 processors are also listed as supported after a BIOS update, but you should always confirm the exact CPU model on MSI's official compatibility list before purchasing. Memory support is DDR4 only. There are four DIMM slots for dual-channel operation, with the official spec listing support for up to 128GB. Memory overclocking up to DDR4-4133 is possible through A-XMP, though most Ryzen builds will be happiest with a DDR4-3200 kit for stable everyday performance. The form factor is standard ATX, so any mainstream mid-tower case will accept it. You need a 24-pin ATX power cable plus an 8-pin EPS connector. A quality 500W PSU can handle a modest Ryzen 5 system, but stepping up to 600W or more leaves room for a discrete GPU and future upgrades. Storage connectivity includes one M.2 slot that supports both PCIe 3.0 x4 NVMe and SATA SSDs, plus six SATA 6Gb/s ports. Expansion is straightforward: one PCIe 3.0 x16 slot for the main graphics card and four PCIe 2.0 x1 slots for smaller cards.

Product Info

The MSI B450 GAMING PLUS MAX was released in 2019 as part of MSI's push to make Ryzen 3000-ready boards accessible to budget builders. It sits in the entry-to-mid tier of the AM4 motherboard lineup, below the X570 flagships but above entry-level A320 boards. Key practical specs include four DDR4 slots, one M.2 slot, six SATA ports, and a rear panel that mixes USB 2.0, USB 3.2 Gen 1, USB 3.2 Gen 2 Type-A, and USB 3.2 Gen 2 Type-C. The board carries a three-year manufacturer warranty, though coverage depends on where you buy it. Pricing in 2026 varies widely by seller, so compare listings carefully before committing. Market positioning is clear: this is a budget-to-mid motherboard for people who want the cheapest reliable route into Ryzen gaming. It is not an enthusiast board, but it covers the basics better than most entry-level chipsets and retains a decent reputation for stability.

Best Use Cases

  • Budget 1080p gaming build: Pair it with a Ryzen 5 3600 or Ryzen 5 5600 and a mid-range GPU. The low platform cost leaves more room in the budget for the graphics card, which matters most for game performance. - AM4 part recycling: If you have an old Ryzen CPU and DDR4 kit lying around, this board is a low-cost way to turn them into a secondary PC, home server, or media center. - Stable daily driver: Users who value predictability over overclocking headroom will like the mature AM4 ecosystem and the straightforward BIOS experience. This board is not ideal for heavy overclocking, multi-GPU experiments, or PCIe 4.0 storage. If any of those matter, a B550 or X570 board is a better match, even at a higher price.

Things to Consider

The biggest limitation is the lack of PCIe 4.0. A modern NVMe SSD will still work in the M.2 slot, but sequential speeds will be capped at PCIe 3.0 levels. This is rarely a problem in real-world use, but enthusiasts who benchmark storage may find it disappointing. CPU compatibility is another area that needs care. Not every AM4 processor is officially supported, and Ryzen 5000 support can hinge on the BIOS revision. Buying from a third-party seller means you cannot always assume the board has been updated, so keep that in mind before installation. Price is the final concern. This board is several years old, and some listings are priced much higher than their hardware generation justifies. If a new B550 board costs about the same, the B550 is usually the better choice because it adds PCIe 4.0 and a more modern feature set. ## FAQ
Q: Can I use a Ryzen 7 5800X3D on this board? A: Support depends on the installed BIOS and the official CPU support list. Update the BIOS to the latest version before using a Ryzen

Product Disclosure (Amazon)

  • Manufacturer: MSI
  • Seller: グリーンマイルズウェイ
  • Fulfilled by: グリーンマイルズウェイ
  • ASIN: B07V9L4RT6
  • Note: This article covers a manufacturer-made product based on Amazon listing details.