MSI B550M-A PRO Motherboard
MSI B550M-A PRO Motherboard
AMD B550 mATX Motherboard for AM4 — Core Boost, Digital PWM, 2oz Copper PCB, No Wi-Fi, 1G LAN, PCIe 4.0 x4 M.2, DDR4 4600+ OC, 2x DDR4 up to 64GB,...
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Description
AMD B550 mATX Motherboard for AM4 — Core Boost, Digital PWM, 2oz Copper PCB, No Wi-Fi, 1G LAN, PCIe 4.0 x4 M.2, DDR4 4600+ OC, 2x DDR4 up to 64GB, 4x SATA, HDMI 2.1 + DVI-D, USB 5Gbps, Ryzen 5000 / 4000G / 3000 Ready.
The MSI B550M-A PRO is the most affordable B550 mATX — a no-frills professional board that brings PCIe 4.0 and Lightning Gen 4 M.2 at the lowest price point in the B550 lineup. It features Core Boost VRM with Digital PWM and 2oz copper PCB, Realtek 1G LAN, 1x PCIe 4.0 x4 CPU M.2, 4x SATA 6G, dual video output (HDMI 2.1 + DVI-D), Audio Boost 7.1-CH, and EZ Debug LED — a clean, stable, and compatible AM4 platform for everyday and professional builds.
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>CPU Support: AMD Ryzen 5000 Series, 5000 G-Series, 4000G-Series, 3000 Series — Socket AM4 (not compatible with Ryzen 5 3400G / Ryzen 3 3200G)
>Power Delivery: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, DDR4 Boost, 1x 4-pin CPU connector
>Storage: M2_1: PCIe 4.0/3.0 x4 + SATA (CPU, 2242/2260/2280); 4x SATA 6G | RAID 0, 1, 10
>Connectivity: No Wi-Fi; Realtek RTL8111H 1G LAN
>USB: Rear — 2x USB 2.0, 4x USB 5Gbps Gen 1 Type-A; Front — 4x USB 2.0, 2x USB 5Gbps Gen 1 Type-A
>PCIe: PCI_E1: PCIe 4.0/3.0 x16 (CPU); 1x PCIe 3.0 x1 (Chipset)
>Audio: Realtek ALC892/ALC897, 7.1-CH, Audio Boost, up to 192kHz
| Specification | Details |
|---|---|
| Chipset | AMD B550 |
| Socket | AM4 |
| Form Factor | mATX (226 x 226 mm), 2oz copper PCB |
| Memory | 2x DDR4 UDIMM, up to 64GB; DDR4 4600+(OC) / 3200(JEDEC) MHz; 1DPC 1R max 4600 MHz / 1DPC 2R max 3866 MHz; Supports ECC UDIMM (non-ECC mode) |
| Memory Standard | A-XMP OC Mode, Dual Channel, Non-ECC Unbuffered |
| PCIe Slots | PCI_E1: PCIe 4.0/3.0 x16 (CPU); 1x PCIe 3.0 x1 (Chipset) |
| M.2 Slots | M2_1: PCIe 4.0/3.0 x4 + SATA (CPU, 2242/2260/2280) — 1 slot only |
| SATA | 4x SATA 6G | RAID 0, 1, 10 |
| LAN | Realtek RTL8111H 1G LAN (no Wi-Fi) |
| Wireless | None |
| Rear USB | 2x USB 2.0, 4x USB 5Gbps Gen 1 Type-A |
| Front USB Headers | 4x USB 2.0, 2x USB 5Gbps Gen 1 Type-A |
| Video Output | 1x HDMI 2.1 (4K@60Hz) + 1x DVI-D (1920x1200@60Hz) — iGPU only (G-Series) |
| Audio | Realtek ALC892/ALC897, Audio Boost, 7.1-CH, up to 192kHz |
| Fan Headers | 1x CPU Fan, 1x System Fan |
| RGB | 4x EZ Debug LED |
| Extras | Click BIOS 5, Game Boost, Creator Genie, TPM header, Chassis Intrusion header, I/O shield included |
| OS Support | Windows 10 64-bit |