This article covers MSI B650M Project Zero ゲーミングマザーボード (AMD Ryzen 9000.

Overview

The MSI B650M Project Zero is a Micro-ATX motherboard that relocates virtually all connectors—power, fan headers, front panel headers—to the back of the PCB. This “Project Zero” design philosophy lets builders achieve an exceptionally clean, near-cable-free interior when paired with a compatible case. It supports AMD Ryzen 7000, 8000, and 9000 series processors on the AM5 socket with DDR5 memory. Targeting the mid-high end of the market, this board comes with PCIe 4.0 M.2 slots, 2.5Gbps LAN, Wi-Fi 6E, and Bluetooth 5.3. It is an ideal foundation for a visually stunning gaming rig or a tidy workstation build. The key trade-off is case compatibility: you need a case specifically designed to work with rear-connector motherboards.

Compatibility Guide

The B650M Project Zero uses the AMD AM5 socket, compatible with all Ryzen 7000/8000/9000 series processors. Memory is limited to DDR5, with official support up to DDR5-7600+ (OC). The form factor is Micro-ATX; it can physically fit in most ATX or MATX cases, but the rear-connector layout requires a chassis with a cutout on the back (MSI’s Project Zero series or select third-party models) to route cables cleanly. Expansion includes one PCIe 4.0 x16 slot, two PCIe 4.0 M.2 slots, and several SATA 6Gb/s ports. Power connectors are a standard 24-pin ATX and an 8-pin CPU power connector. The rear I/O features USB 3.2 Gen 2x2 Type-C (20Gbps), HDMI, and DisplayPort outputs.

Product Info

Released in mid-2024, the MSI B650M Project Zero carries a street price around ¥33,000–¥35,000. It is built on the AMD B650 chipset and emphasizes memory overclocking stability. The warranty is the standard three years from MSI. Availability is wide through , major PC retailers, and the MSI online store. This board sits in the upper-mid range. Its standout feature is the Project Zero hidden-connector layout, which appeals to builders who prioritize clean aesthetics.

Best Use Cases

Aesthetic-focused PC builders: If you want a showcase build with minimal visible cables, this board is perfect when paired with a compatible case. The result is a near-cable-free front side. Mid-high-end gaming PCs: Combine with a Ryzen 7 or 9, DDR5-6000+ memory, and a PCIe 4.0 GPU (e.g., RTX 4070 or RX 7800 XT) for a powerful, clean-looking system. * Enthusiasts who enjoy tinkering: The unique layout makes cable management a breeze and creates a sense of accomplishment. However, beginners should ensure they buy the right case.

Things to Consider

Case compatibility is the biggest caveat. You must use a case that supports rear-connector motherboards (MSI Project Zero cases or a few third-party options). Installing this board in a standard case largely defeats its purpose and may cause interference. Also, the B650 chipset offers fewer PCIe lanes than the X670/X870 series. Multi-GPU setups or heavy expansion with multiple NVMe drives might saturate the available bandwidth. For most single-GPU gaming or content creation builds, this is not an issue. Memory overclocking stability depends on the CPU’s integrated memory controller. Reaching DDR5-7600+ requires careful component selection and possibly manual tuning. ## FAQ
Q: Can I use this motherboard with a regular ATX case? A: Physically yes, but you will lose the clean-cable benefit because standard cases lack the rear cutouts for the reversed connectors. Cables would need to bend awkwardly, and some headers may not reach the back. A dedicated Project Zero case is strongly recommended. Q: Does it support Ryzen 9000 series out of the box? A: MSI lists support for Ryzen 9000 series. An initial BIOS update may be required, but the board has BIOS Flashback, allowing updates without a CPU installed. Q: Why no PCIe 5.0? A: The B650 chipset is PCIe 4.0 native. The slots and M.2 connectors are PCIe 4.0 only. For PCIe 5.0, consider X670E, X870, or future chipset boards.

Product Disclosure (Amazon)

  • Manufacturer: MSI
  • Seller: ジュリア本店
  • Fulfilled by: ジュリア本店
  • ASIN: B0CPWQY9Y4
  • Note: This article covers a manufacturer-made product based on Amazon listing details.