ASUS Prime B850-Plus Wi-Fi ATX Motherboard AM5 DDR5

The ASUS Prime B850-Plus Wi-Fi is an ATX motherboard for AMD Ryzen 9000, 8000, and 7000 Series processors on the AM5 platform. It supports up to 256GB of DDR5 memory, offers PCIe 5.0 support, three M.2 slots, Wi-Fi 6E, and Realtek 2.5GbE LAN, making it a capable and practical choice for mainstream AM5 builds.

UK-based seller
Tracked delivery across the UK
Genuine product sourced through established UK suppliers and distribution partners

Key Features

• Socket AM5 — compatible with AMD Ryzen 9000, 8000 and 7000 Series processors
• AMD B850 chipset
• ATX form factor, 305 x 244 mm
• 4 x DDR5 DIMM slots, Dual Channel, ECC/Non-ECC, up to 256GB, DDR5-8200 (OC)
• 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x16 (x4 bandwidth), 2 x PCIe 3.0 x16 (x1 bandwidth)
• 3 x M.2 slots: 1 x PCIe Gen5 x4, 1 x PCIe Gen4 x4, 1 x PCIe Gen4 x2
• 4 x SATA 6Gb/s ports with RAID 0, 1, 5, 10 support
• Realtek 2.5GbE LAN with ASUS LANGuard
• Wi-Fi 6E (802.11ax), 2.4/5/6GHz, with Bluetooth 5.3
• Realtek 7.1 HD Audio

Product Overview

The Prime B850-Plus Wi-Fi is a well-specified entry into the AM5 platform, offering a solid foundation for both new builds and upgrades. With support for up to 256GB of DDR5 memory and ECC compatibility, it suits both gaming and light workstation use. Three M.2 slots, including one PCIe Gen5 x4, provide fast and flexible storage options. Wi-Fi 6E covers the 2.4, 5, and 6GHz bands, and the BIOS Flashback button allows firmware updates without a CPU or memory installed. ASUS 5X Protection III components and a reinforced SafeSlot add to the board's long-term reliability.

Delivery & Fulfilment

This product is sold by TechFinder UK, a UK-based sole trader business. All hardware is sourced through established UK suppliers and distribution partners. Customers can typically expect to receive their order within 3–5 business days from the date the order is placed, with free tracked delivery across the United Kingdom.

Why Buy from TechFinder UK?

• UK-based sole trader — genuine products, real accountability
• Sourced through established UK suppliers and distribution partners
• Secure checkout
• Free tracked UK delivery — typically 3–5 business days from the date the order is placed
• Pre- and post-purchase support available

Technical Specifications

• Socket: AM5
• Compatible Processors: AMD Ryzen 9000, 8000 and 7000 Series
• Chipset: AMD B850
• Form Factor: ATX
• Dimensions: 305 x 244 mm
• Memory Type: DDR5, Dual Channel, ECC/Non-ECC, Unbuffered (UDIMM)
• Memory Slots: 4 x 288-pin DIMM
• Max Memory: 256GB
• Memory Speed: Up to DDR5-8200 (OC)
• PCIe Slots: 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x16 (x4 bandwidth), 2 x PCIe 3.0 x16 (x1 bandwidth)
• M.2 Slots: 1 x PCIe Gen5 x4 (22-80), 1 x PCIe Gen4 x4 (22-80), 1 x PCIe Gen4 x2 (22-80)
• SATA: 4 x SATA 6Gb/s
• RAID: 0, 1, 5, 10
• LAN: Realtek 2.5GbE (10/100/1000/2500 Mbps) with ASUS LANGuard
• Wireless: Wi-Fi 6E (802.11ax), 2.4/5/6GHz
• Bluetooth: 5.3
• Audio: Realtek 7.1 HD Audio, S/PDIF-Out (internal header)
• Onboard Graphics Output: 1 x DisplayPort 1.4; 1 x HDMI 2.1 — requires CPU with integrated graphics
• Rear I/O: 2 x USB 2.0, 2 x USB 5Gbps Type-A, 3 x USB 10Gbps Type-A, 1 x USB 10Gbps Type-C, 1 x DisplayPort 1.4, 1 x HDMI 2.1, 1 x RJ-45, Line In/Line Out/Mic-In, BIOS Flashback button
• Internal Headers: 6 x USB 2.0 (via 3 headers), 1 x USB 5Gbps header, 1 x USB 5Gbps connector, 1 x USB4 header, 3 x ARGB Gen2, 4 x Chassis Fan, 1 x CPU Fan, 1 x CPU OPT Fan, 1 x AIO Pump, 1 x Front Panel, 1 x Front Panel Audio, 1 x S/PDIF-Out, 1 x Chassis Intrusion, 1 x Clear CMOS, 1 x COM (Serial), 1 x TPM (SPI)
• Power Connectors: 1 x 24-pin ATX, 1 x 8-pin EPS, 1 x 4-pin ATX
• BIOS: 256Mb Flash ROM, UEFI AMI BIOS
• Board Weight: 1.05 kg
• Gross Weight: 1.64 kg
• Package Dimensions: 35.3 x 27.3 x 6.8 cm
• Warranty: 3 Years ASUS Manufacturer Warranty
• Package Contents: Motherboard, 2 x SATA 6Gb/s cables, 1 x ASUS WiFi Q-Antenna, 1 x M.2 rubber package, 3 x M.2 screw packages, 1 x Quick start guide

Product Identification

Model: Prime B850-Plus Wi-Fi
MPN: 90MB1L80-M0EAY0
EAN: 4711387931509
UPC: 197105931503