- $159.99
- Free 86-day Returns
$139.99
Add to PC build list
Sold by Newegg
Shipped by Newegg
Add to Wish List(Found on 83 wish lists)
Best Sellers
Hot Seller- $179.44
- + $10.99 Shipping
Top Rated- $198.99
- + $9.99 Shipping
Top Rated- $221.78
- + $13.98 Shipping
ASUS Prime B550M-A WiFi II AMD AM4 (3rd Gen Ryzen) Micro ATX Motherboard (PCIe 4.0, WiFi 6, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, Addressable Gen 2 RGB Header and Aura Sync)
- 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 6 (802.11ax), 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
- Enhanced Power Solution: 8+1 DrMOS power stages with high-quality alloy chokes and durable capacitors to provide reliable power for the last AMD high-count-core CPUs
- Aura Sync RGB: Synchronizable LED effects across a wide range of compatible PC gear, plus RGB LED and Addressable Gen 2 RGB headers
Combo Up Savings Up To $2060+
The more you add, the more you'll save!+
+
Overview
Specs
Reviews (61)
Powered by 3rd Gen AMD® Ryzen processors, the ASUS Prime B550M-A WiFi II delivers next-generation speeds with PCIe 4.0, WiFi 6 and 1Gb LAN. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, the ASUS Prime B550M-A WiFi 6 provides mainstream PC users and DIY PC builders with a perfect all-around foundation via intuitive software and firmware features.
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 3 years
- Limited Warranty period (labor): 3 years
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.ca's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-510-739-3777
- Support Website
- View other products from ASUS
LOADING...
LOADING...
The ASUS Prime B550M-A WiFi II is a Micro-ATX AM4 motherboard for compatible AMD Ryzen 3000, 4000G, and 5000-series processors, suited to compact PC builds that need Wi-Fi 6, dual M.2 slots, and PCIe 4.0 support.
Recommended For
- AM4 builders assembling a compact Micro-ATX PC who want onboard Wi-Fi 6 and Bluetooth instead of using expansion slots for wireless networking.
- Ryzen gamers using a mainstream AM4 processor and a discrete graphics card who want a compact DDR4 platform with PCIe 4.0 support and two M.2 slots.
- Small home-server or workstation builders who want a Micro-ATX AM4 board with potential ECC memory support; ECC operation depends on the selected CPU, so verify processor support before buying.
- Builders reusing compatible AM4 Ryzen CPUs and DDR4 memory who want a board with wired Gigabit Ethernet, built-in Wi-Fi, and outputs for a compatible processor’s integrated graphics.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | AM4 desktop PC builds using supported AMD Ryzen processors, DDR4 memory, PCIe expansion, and wired or Wi-Fi networking |
| Processor And Chipset | AMD B550 chipset with an AM4 socket; supports Ryzen 5000, 5000 G-Series, 4000 G-Series, and 3000 Series processors |
| Memory Configuration | Four DDR4 288-pin slots support up to 128GB in dual-channel mode; speeds range from DDR4-2133 to DDR4-3200 standard and up to DDR4-4866 overclocked, depending on CPU. Unbuffered memory, Intel XMP 2.0, and CPU-dependent ECC mode are supported |
| PCIe Expansion | Includes one PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot, one PCIe 2.0 x16 slot, three PCIe x4 slots, two PCIe 3.0 x1 slots, and one PCI slot; graphics cards use a PCI Express interface |
| Storage And RAID | Two M.2 slots support PCIe and SATA modes, with the primary slot supporting up to PCIe 4.0 x4 with compatible processors; four SATA 6Gb/s ports support RAID 0, 1, and 10 |
| Networking And Wireless | Realtek 1Gb Ethernet plus Wi-Fi 6 (802.11a/b/g/n/ac/ax) and Bluetooth 5.2 |
| Rear I/O And Internal USB | Rear I/O has two USB 3.2 Gen 2 Type-A and four USB 3.2 Gen 1 Type-A ports; internal headers add two USB 3.2 Gen 1 and four USB 2.0 ports |
| Display Outputs | D-Sub, DVI-D, and HDMI outputs; onboard video is available only with a processor that has integrated graphics |
| Audio | Realtek 7.1-channel HD audio codec with three rear audio jacks; 7.1-channel output requires a chassis with a front-panel HD audio module |
| Cooling And RGB | VRM heatsink, one CPU fan header, one CPU optional fan header, two chassis fan headers, one Addressable Gen 2 header, and two AURA RGB headers |
| Power And Headers | 24-pin main power and 8-pin +12V power connectors; also includes Clear CMOS, COM, front-panel audio, S/PDIF out, speaker, SPI TPM, and system-panel headers |
| Form Factor And Dimensions | Micro ATX motherboard measuring 9.6 × 9.6 inches |
| Operating System Support | Supports 64-bit Windows 10 and Windows 11 |
| Model Identifiers | ASUS Prime; model PRIME B550M-A WIFI II; part number 90MB19X0-M0AAY0 |