The MSI B850MPower uses the AM5 socket paired with the B850 chipset and comes in a Micro-ATX form factor measuring 243.8 mm × 243.8 mm, making it a compact yet capable platform for AMD builds. Wireless connectivity is well covered, with Wi-Fi 7 (802.11be) support spanning all major standards from Wi-Fi 4 through Wi-Fi 7, alongside Bluetooth 5.4 with aptX. The board features HDMI 2.1 output, RGB lighting, and a clear CMOS button for easy BIOS resets, though it does not include dual BIOS, integrated graphics, or an integrated CPU. Overclocking is straightforward by design, and the board is backed by a three-year warranty.
The B850MPower supports DDR5 memory across two slots in a dual-channel configuration, with a maximum supported capacity of 128 GB. Standard memory speeds reach up to 5600 MHz, while overclocked profiles can push that figure all the way to 10200 MHz. ECC memory is not supported on this board.
The rear I/O panel offers a solid range of USB connectivity, including three USB 3.2 Gen 2 Type-A ports, four USB 3.2 Gen 1 Type-A ports, one USB 3.2 Gen 2 Type-C port, and one USB 3.2 Gen 2x2 Type-C port, while USB 2.0, USB 4, Thunderbolt 3, and Thunderbolt 4 are absent. Video output is handled by a single HDMI port, with no DisplayPort, DVI, or VGA connectors present. A single RJ45 port covers wired networking, and there are no eSATA or PS/2 ports included.
For internal expansion, the board provides four M.2 sockets and two SATA 3 connectors for storage, with no SATA 2, mSATA, or U.2 sockets available. USB headers cover two USB 3.2 Gen 1 ports, two USB 3.0 ports, four USB 2.0 ports, and one USB-C 3.2 Gen 2 port for front-panel connectivity, while Gen 2x2 expansion headers are not included. Cooling is well catered for with six fan headers, and a TPM connector is also present on the board.
The B850MPower keeps its expansion slot layout straightforward, offering one PCIe 5.0 x16 slot as the primary graphics interface and one PCIe x4 slot for additional cards. There are no PCIe 2.0, 3.0, or 4.0 x16 slots, and no PCIe x1, x8, or legacy PCI slots are present on the board.
The onboard audio delivers 7.1-channel sound with a DAC signal-to-noise ratio of 120 dB, providing clean output across the full channel configuration. Two analog audio connectors are available on the rear panel, and an S/PDIF output port is included for digital audio passthrough to external receivers or DACs.
The B850MPower supports RAID 0, 1, 5, and 10 configurations, covering the most common setups for both performance-oriented and redundancy-focused storage arrangements. RAID 0+1 is not supported on this board.
