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)
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*Price sourced from Amazon.com. Last updated 2026-04-20. Price and availability subject to change.
Bottom line: The 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) is a niche pick — read recent reviews before buying in the retro motherboards category, priced around $79.99. Compare close alternatives before committing.
Powered by 3rd Gen AMD® Ryzen™ processors, the ASUS Prime B550M-A AC delivers next-generation speeds with PCIe 4.0, WiFi and 1Gb LAN. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, the ASUS Prime B550M-A AC provides mainstream PC users and DIY PC builders with a perfect all-around foundation via intuitive software and firmware features.
SpecPicks Verdict
SpecPicks scored ASUS Prime B550M-A AC AMD AM4 (3rd Gen Ryzen™) Micro ATX Motherboard… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the retro motherboards category. Compare with similarly-priced alternatives in the retro motherboards category before committing. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.
Common buyer scenarios for retro motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
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.
Full Specifications
| Brand | ASUS |
|---|---|
| Platform | Windows 10 |
| CPU Socket | Socket AM4 |
| Model Name | Prime |
| Chipset Type | AMD |
| Connectivity | USB, WiFi |
| Model Number | B550M-A AC |
| Item Type Name | Motherbaord |
| Mfr Part Number | PRIME B550M-A AC |
| Number of Ports | 4 |
| Total Usb Ports | 6 |
| Processor Socket | Socket AM4 |
| Total PCIe Ports | 3 |
| Total SATA Ports | 4 |
| 5X Protection III | all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O |
| Compatible Devices | Personal Computer |
| Memory Clock Speed | 3.9 GHz |
| Warranty Description | 3 Years |
| Compatible Processors | AMD 3rd Generation Ryzen |
| Comprehensive Cooling | VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2 utility |
Ready to buy?
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) is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-04-20. Price and availability subject to change.
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