# ASUS Prime B550M-A AC AMD AM4 (3rd Gen Ryzen™) Micro ATX Motherboard (PCIe 4.0, WiFi, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, Addressable Gen 2 RGB Header and Aura Sync)

- Category: Motherboard
- Brand: ASUS
- Model: B550M-A AC
- Part number: PRIME B550M-A AC
- Price (US): $99.99
- Price last checked: 2026-08-07
- Rating: 4.6/5 from 1395 Amazon reviews
- Warranty: 3 years
- Product page: https://buildmypc.net/component-details/motherboard/asus-b550m-a-ac-prime-b550m-a-ac/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | ASUS |
| Model | B550M-A AC |
| Socket Type | AM4 |
| Chipset | AMD B550 |
| Form Factor | Micro ATX |
| Memory Type | 4 x DDR4 |
| Max Memory Support | 128 GB |

## Key Features

- AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs
- Ultrafast Connectivity: 1x PCIe 4.0 x16 SafeSlot, WiFi, 1Gb LAN, dual M.2 slots (NVMe SSD)—one with PCIe 4.0 x4 connectivity, USB 3.2 Gen 2 Type-A , HDMI 2.1 (4K@60HZ), D-Sub & DVI
- Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2 utility
- 5X Protection III: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O
- Boosted Memory Performance: ASUS OptiMem proprietary trace layout allows memory kits to operate at higher frequencies with lower voltages to maximize system performance.

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