This article covers ASRock B650M Pro RS Micro-ATXマザーボード MB6163.

Overview

The ASRock B650M Pro RS is a Micro-ATX motherboard built around AMD's B650 chipset, supporting the full Socket AM5 lineup including Ryzen 9000, 8000G, and 7000 series processors. Its 8+2+1 phase Dr.MOS power delivery is well-suited for mid-range Ryzen 5 and Ryzen 7 chips, offering stable operation without breaking the bank. Memory support is DDR5-only, with four DIMM slots accepting up to 256GB and overclocking headroom beyond 7200MT/s. Storage connectivity is a highlight: one PCIe 5.0 x4 M.2 slot for next-gen SSDs, plus two additional PCIe 4.0 M.2 slots and four SATA 6Gbps ports. Priced around ¥17,000 in Japan, the B650M Pro RS sits firmly in the budget-to-mid-range segment. It's an excellent choice for builders who want DDR5 and PCIe 5.0 support without paying a premium for an X670 or B650E board.

Compatibility Guide

CPU socket is Socket AM5 only. Compatible with Ryzen 7000 (Raphael), Ryzen 8000G (Phoenix), and Ryzen 9000 (Granite Ridge) series. A BIOS update may be required for newer CPU generations, but the BIOS Flashback button allows updating without a CPU installed. Memory is exclusively DDR5. Four slots support dual-channel configuration with both Intel XMP and AMD EXPO profiles. Rated speed is DDR5-4800, but overclocking to 7200MT/s or higher is achievable depending on your memory kit and CPU memory controller. Form factor is Micro-ATX (244mm × 244mm). Fits in most Micro-ATX and ATX cases. Expansion slots include one PCIe 4.0 x16 (full bandwidth) and one PCIe 3.0 x4 (x16 physical slot). The second slot is limited to x4 electrical, making it unsuitable for a second GPU. Storage: three M.2 slots — one PCIe 5.0 x4 (Hyper M.2), one PCIe 4.0 x4, one PCIe 4.0 x2. Plus four SATA 6Gbps ports. Total of seven drives possible. Rear I/O: USB 10Gbps Type-C ×1, USB 10Gbps Type-A ×1, USB 5Gbps Type-A ×2, USB 2.0 ×4. Video outputs: DisplayPort 1.4 and HDMI 2.1. Networking: Dragon RTL8125BG 2.5GbE LAN.

Product Info

Released in mid-2023, the ASRock B650M Pro RS is a budget-to-mid-range motherboard. The 8+2+1 phase Dr.MOS VRM is adequate for Ryzen 5 and Ryzen 7 CPUs, but may struggle under sustained full load with a Ryzen 9. The board includes a pre-installed I/O shield and BIOS Flashback button for easy troubleshooting. Warranty is the standard 3 years from ASRock. Available at major Japanese retailers and for around ¥16,980. Market positioning is clear: it delivers the essentials (DDR5, PCIe 5.0 M.2, 2.5GbE) at a price that undercuts most B650 competitors.

Best Use Cases

Budget-conscious gamers: Pair with a Ryzen 5 7600 or Ryzen 7 7800X3D for a high-value gaming rig. DDR5 memory and PCIe 5.0 SSD support future-proof the build without overspending on the motherboard. Compact PC builders: Micro-ATX form factor allows smaller cases than ATX while retaining more expansion than Mini-ITX. Three M.2 slots and four SATA ports provide ample storage for most users. Ryzen 8000G APU users: The DisplayPort 1.4 and HDMI 2.1 outputs make this board a solid foundation for an office PC or light gaming machine using integrated graphics. Budget creative workstations: If your workflow benefits from fast DDR5 memory and PCIe 5.0 storage but you don't need multiple GPUs, this board saves money for other components.

Things to Consider

The single full-speed PCIe x16 slot is a limitation — the second slot is only PCIe 3.0 x4, so multi-GPU setups are not practical. If you plan to use two graphics cards or multiple high-bandwidth PCIe devices, look at ATX boards with more lanes. The VRM is entry-level: 8+2+1 phases. While fine for Ryzen 5 and Ryzen 7, a Ryzen 9 7950X or 9950X under sustained all-core load may push VRM temperatures higher than ideal. For 16-core CPUs, consider a board with a beefier power stage. Audio uses the Realtek ALC897 codec, which is a step down from the ALC1220 or ALC4080 found on premium boards. Audiophiles or users with high-impedance headphones should plan on using a USB DAC. ## FAQ
Q: Can I use Ryzen 9000 series CPUs out of the box? A: Yes, Socket AM5 Ryzen 9000 CPUs are physically compatible. However, early production boards may need a BIOS update. The BIOS Flashback feature lets you update without a CPU installed. Q: Which M.2 slot supports PCIe 5.0? A: Only the Hyper M.2 slot (M.2_1, CPU-attached) supports PCIe 5.0 x4. The other two M.2 slots are PCIe 4.0 (x4 and x2). Q: Is the B650M Pro RS a good match for a Ryzen 7 7800X3D? A: Yes, it's an excellent pairing. The 7800X3D has a 120W TDP, well within the 8+2+1 phase VRM's capability. You get great gaming performance without overspending on the motherboard.

Product Disclosure (Amazon)

  • Manufacturer: ASRock
  • ASIN: B0C6HWFVNS
  • Note: This article covers a manufacturer-made product based on Amazon listing details.