Placa-mãe Sapphire NITRO+ B850A WIFI 7 AMD B850 Socket AM5 micro ATX, DDR5, 4 DIMM, 256GB, Wi‑Fi 7, 2.5GbE

The SAPPHIRE B850 microATX motherboard with AMD AM5 socket is designed for desktop systems using AMD Ryzen 7000, 8000 and 9000 series processors. It supports DDR5 memory across four DIMM slots (up to 256 GB) and offers PCIe 5.0 x16 graphics support plus PCIe 5.0 M.2 storage compatibility. Integrated networking includes 2.5 Gigabit Ethernet and optional Wi‑Fi 7 with Bluetooth 5.3, while onboard audio uses a Realtek ALC897 codec for up to 7.1 channels. The board features a robust 12+2+1 phase CPU power delivery with 55A per phase and enhanced cooling for VRM, M.2 and PCH components.

Advantages

This AMD AM5 motherboard provides strong power delivery and thermal management suitable for high‑performance Ryzen CPUs, ensuring stable operation under load. PCIe 5.0 support for both the x16 slot and M.2 storage enables next‑generation GPU and NVMe SSD compatibility. The four DDR5 DIMM slots allow high memory capacity and overclocking up to 8000 MHz (OC), making it flexible for gaming and content creation builds. Built‑in networking options include 2.5 Gigabit Ethernet and support for Wi‑Fi 7 and Bluetooth 5.3 for modern connectivity needs.

Key specifications

• Socket: AMD AM5 (supports AMD Ryzen 7000, 8000, 9000 series)
• Form factor: micro ATX (mATX)
• Chipset: AMD B850
• CPU power phases: 12+2+1, 55A per phase
• Memory: DDR5, 4 DIMM slots, up to 256 GB, Dual Channel, up to 8000 MHz (OC)
• PCIe: PCI Express 5.0 x16 for GPU
• M.2: PCIe 5.0 M.2 support
• Storage interfaces: PCIe 4.0, PCIe 5.0, SATA III
• LAN: 2.5 Gigabit Ethernet
• Wireless: Wi‑Fi 7 (802.11be) support, Bluetooth 5.3
• Audio: Realtek ALC897, up to 7.1 channels
• Features: SAPPHIRE CORE BIOS, Debug LED, robust VRM and M.2/PCH cooling

How to use

Install an AMD Ryzen processor compatible with the AM5 socket and mount DDR5 memory modules in the four DIMM slots following the motherboard manual for recommended slot population. Fit a PCIe 5.0 graphics card into the x16 slot and install M.2 NVMe SSDs into the supported M.2 slots, ensuring thermal pads or heatsinks are correctly positioned for M.2 cooling. Connect power from a compatible PSU to the 24‑pin ATX and CPU power connectors, attach storage and peripherals via SATA and USB ports, and configure BIOS settings using the SAPPHIRE CORE BIOS for memory overclocking, boot order and network options.

Recommendations

For optimal performance, use a high‑quality CPU cooler and ensure proper case airflow to keep the VRM and M.2 temperatures low. Pair DDR5 modules with the same specifications for stable operation and update the SAPPHIRE CORE BIOS to the latest version for processor compatibility and improved stability.