This article covers ASUS Prime B550-PLUS AMD B550 ソケット AM4 ATX DDR4-SDRAM マザーボード.

Overview

The ASUS Prime B550-PLUS is an ATX motherboard built on the AMD B550 chipset, designed for Socket AM4 processors. It supports DDR4 memory up to 128GB and features PCIe 4.0 for high-speed storage and graphics. This board is aimed at mid-range builders who want a reliable foundation for a Ryzen-based system without breaking the bank. It offers a solid balance of features, stability, and expandability, making it a popular choice for mainstream gaming and productivity builds.

Compatibility Guide

CPU socket: AMD AM4, compatible with Ryzen 3000, 4000 G-series, and 5000 series processors. Memory: DDR4, up to 128GB across four slots, with XMP support. Form factor: standard ATX, fits most mid-tower and full-tower cases. Power: 24-pin main + 8-pin EPS CPU power, recommended PSU wattage around 650W for a typical mid-range build. Storage: two M.2 slots (one PCIe 4.0 CPU-direct, one PCIe 3.0 chipset) and six SATA 6Gb/s ports.

Product Info

Released in mid-2020, the ASUS Prime B550-PLUS is a mid-range motherboard with a price around $150-170 USD. It comes with a 3-year manufacturer warranty. The B550 chipset brings PCIe 4.0 support to the primary x16 slot and one M.2 slot, while the rest of the platform runs at PCIe 3.0. The board includes Realtek ALC887/897 audio, Realtek GbE LAN, and a comprehensive set of USB ports including USB 3.2 Gen 2 Type-A and Type-C on the rear I/O.

Best Use Cases

Budget 1080p Gaming Build: Pair with a Ryzen 5 5600 or 5600X and a mid-range GPU like RTX 3060 or RX 6600 for smooth 1080p gaming. The PCIe 4.0 M.2 slot lets you use a fast NVMe SSD for quick load times. Cost-Conscious DIY PC Builder: If you want a reliable, no-frills motherboard that covers all the basics—good VRM, dual M.2, plenty of USB—this is a great value choice. It lacks Wi-Fi, but that keeps the price low. * Office or Home Server: The board's stability and multiple SATA ports make it suitable for a file server or general office PC. Memory support up to 128GB allows for virtualization or heavy multitasking.

Things to Consider

This motherboard does not have built-in Wi-Fi or Bluetooth; you'll need to add a PCIe or USB adapter for wireless connectivity. The secondary PCIe x16 slot runs at PCIe 3.0 x4 (via chipset), so it's best suited for expansion cards like capture cards rather than a second GPU. The VRM heatsinks are adequate for stock operation but may struggle with heavy overclocking on a 12-core Ryzen 9. Additionally, the RGB ecosystem is limited to ASUS Aura Sync; other brands' RGB components may require separate software. ## FAQ
Q: Can I use a Ryzen 7 5800X3D on this board? A: Yes, with BIOS version 2607 or later. The 8+2 VRM design can handle the 5800X3D at stock settings, but for sustained all-core workloads, ensure adequate case airflow. Q: How many M.2 SSDs can I install? A: Two M.2 slots are available: one PCIe 4.0 x4 (CPU) and one PCIe 3.0 x4 (chipset). Both also support SATA M.2 drives. Additionally, six SATA ports are available for 2.5-inch/3.5-inch drives. Q: What memory speeds are supported? A: Officially, the board supports DDR4 up to 4600+ MHz (OC). Real-world stable speeds typically range from 3200 to 3600 MHz depending on the CPU's memory controller and the kit's quality. XMP profiles work without issue.

Product Disclosure (Amazon)

  • Manufacturer: ASUS
  • Seller: EFI Global Store JP
  • Fulfilled by: EFI Global Store JP
  • ASIN: B089HGSZ1J
  • Note: This article covers a manufacturer-made product based on Amazon listing details.