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MSI PRO B850M-E EVO
Description
The MSI PRO B850M-E EVO is an mATX motherboard based on the AMD B850 chipset for Socket AM5. It supports AMD Ryzen 9000 / 8000 / 7000 series desktop processors, up to 128 GB DDR5 (2 DIMMs), a PCIe 5.0 x16 slot (from CPU) and a Gen5 M.2 slot for high-speed NVMe storage.
Other features include Realtek 2.5Gbps LAN, 7.1-channel HD audio with Audio Boost, 4 x SATA 6Gb/s, multiple USB 5Gbps ports and EZ DIY conveniences like EZ PCIe Clip II and EZ Debug LEDs. Form factor: mATX (243.84 x 215 mm).
Specifications
| Model | PRO B850M-E EVO |
| Chipset | AMD B850 |
| CPU Support | AMD Ryzen 9000 / 8000 / 7000 Series (Socket AM5) |
| Form Factor | mATX (243.84 x 215 mm) |
| Memory | 2 x DDR5 DIMM, up to 128 GB; EXPO / A-XMP support (up to 8200+ MT/s OC) |
| Expansion Slots | 1 x PCIe 5.0 x16 (from CPU), 1 x PCIe 3.0 x1 (from chipset) |
| M.2 | 1 x M.2 Gen5 x4 (2280/2260), supports PCIe 5.0 x4 |
| SATA | 4 x SATA 6Gb/s |
| USB | 6 x USB 5Gbps (Type-A, rear), 6 x USB 2.0 |
| LAN | Realtek 2.5Gbps LAN |
| Audio | Realtek ALC897, 7.1-Channel HD Audio with Audio Boost |
| BIOS | 64 MB BIOS ROM |
| Other | EZ PCIe Clip II, EZ Debug LED, Frozr AI Cooling, Core Boost |
Sources: MSI product page and official datasheet.
Overview
MSI's PRO B850M-E EVO delivers a solid, no-frills AM5 platform in a compact mATX package. It brings PCIe 5.0, M.2 Gen5 support and a capable VRM layout (6+2+1 digital phases) — making it a great choice for productivity builds or compact gaming rigs using modern Ryzen CPUs. A reliable pick for users who want contemporary connectivity without gamer-centric aesthetics.
