ASUS Prime B550M-A WiFi II AMD AM4 (3rd Gen Ryzen) Micro ATX Motherboard
The ASUS Prime B550M-A WiFi II is a Micro ATX motherboard for AMD AM4 processors, featuring Wi-Fi 6, Bluetooth 5.2, and dual M.2 slots with PCIe 4.0 support. It supports up to 128GB DDR4 RAM, Realtek 1Gb Ethernet, and 7.1-channel audio, with ASUS 5X Protection III for reliability. Ideal for compact builds, it includes Aura Sync RGB and is Windows 11 ready.
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₨ 38,885
Description
The ASUS Prime B550M-A WiFi II is a Micro ATX motherboard built for AMD AM4 platforms, supporting Ryzen 5000/4000/3000 series processors. It features the AMD B550 chipset, PCIe 4.0 support, and integrated Wi-Fi 6 and Bluetooth 5.2 for fast connectivity. With dual M.2 slots, four SATA 6Gb/s ports, and support for up to 128GB of DDR4 RAM, this board offers solid expansion options for a compact build.
Designed with ASUS 5X Protection III, the motherboard includes DIGI+ VRM, LANGuard, and SafeSlot Core for enhanced durability. Aura Sync RGB headers allow customization, while the comprehensive cooling options (CPU, chassis fan headers) and Q-Design features like Q-DIMM and Q-Slot simplify installation. The board is Windows 11 ready and comes with a 2-year warranty.
- AMD AM4 socket with support for Ryzen 5000/4000/3000 series CPUs; B550 chipset
- Dual M.2 slots (PCIe 4.0 x4 for Ryzen 5000/3000, PCIe 3.0 x4 for G-series) and 4x SATA 6Gb/s with RAID 0/1/10
- Wi-Fi 6 (802.11ax) and Bluetooth 5.2 for wireless connectivity
- Realtek 1Gb Ethernet, 7.1-channel HD audio, and multiple USB 3.2 Gen 2/1 ports
- ASUS 5X Protection III, Aura Sync RGB headers, and comprehensive cooling fan headers
Specification
Overview
| Warranty | 2 Years |
|---|---|
| Brand | ASUS |
| Model | PRIME B550M-A WIFI II |
| Part Number | 90MB19X0-M0AAY0 |
| CPU Socket Type | AM4 |
| CPU Type | Supports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series Processors, * Refer to www.asus.com for CPU support list. |
| Chipset | AMD B550 |
| Number of Memory Slots | 4x288pin (DDR4) |
| Memory Standard | DDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3200 / 3000 / 2933 / 2800 / 2666 / 2400 / 2133*, * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types. |
| Maximum Memory Supported | 128GB |
| Channel Supported | Dual Channel |
| ECC Supported | ECC memory (ECC mode) support varies by CPU |
| Buffer Supported | Un-buffered |
| PCI Express 4.0 x16 | 1 x PCI Express 4.0 x16*, * Actual support may vary by CPU. |
| PCI Express x1 | 2 x PCIe 3.0 x1 |
| SATA 6Gb/s | 4 x SATA 6Gb/s |
| M.2 | AMD Ryzen 5000 Series/ 3000 Series Desktop Processors:, M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes), AMD Ryzen 5000 G-Series/ 4000 G-Series Desktop Processors:, M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes), AMD B550 Chipset:, M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) |
| SATA RAID | 0/1/10 |
| Onboard Video Chipset | Supported only by CPU with integrated graphic |
| Audio Chipset | Realtek 7.1 Surround Sound High Definition Audio CODEC |
| Audio Channels | 7.1 Channels*, * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. |
| LAN Chipset | Realtek 1Gb Ethernet |
| Max LAN Speed | 1Gbps |
| Wireless LAN | Wi-Fi 6, 802.11 a/b/g/n/ac/ax |
| Bluetooth | Bluetooth 5.2 |
| Back I/O Ports | 2 x USB 3.2 Gen 2 ports (2 x Type-A), 4 x USB 3.2 Gen 1 ports (4 x Type-A), 1 x D-Sub port, 1 x DVI-D port, 1 x HDMI port, 1 x Wi-Fi Module, 1 x Realtek 1Gb Ethernet port, 3 x Audio jacks, 1 x PS/2 Keyboard/Mouse combo port |
| Onboard USB | 1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports, 2 x USB 2.0 headers support additional 4 USB 2.0 ports |
| Other Connectors | Fan and Cooling related, 1 x 4-pin CPU Fan header, 1 x 4-pin CPU OPT Fan header, 2 x 4-pin Chassis Fan headers, Miscellaneous, 1 x Addressable Gen 2 header, 2 x AURA RGB headers, 1 x Clear CMOS header, 1 x COM Port header, 1 x Front Panel Audio header (AAFP), 1 x S/PDIF Out header, 1 x Speaker header, 1 x SPI TPM header (14-1pin), 1 x 10-1 pin System Panel header |
| Form Factor | Micro ATX |
| LED Lighting | RGB |
| Dimensions (W x L) | 9.6″ x 9.6″ |
| Power Pin | 1 x 24-pin Main Power connector, 1 x 8-pin +12V Power connector |
| Windows 11 | Ready |
| Features | Special Features:, ASUS 5X PROTECTION III, – DIGI+ VRM, – LANGuard, – Overvoltage Protection, – SafeSlot Core, – Stainless-Steel Back I/O, ASUS Q-Design, – Q-DIMM, – Q-Slot, ASUS Thermal Solution, – VRM heatsink design, AURA Sync, – AURA RGB headers, – Addressable Gen 2 header, Software Features:, ASUS Exclusive Software, Armoury Crate, – AURA Creator, – AURA Sync, AI Suite 3, – Performance and Power Saving Utility, TurboV EVO, EPU, DIGI+ VRM, Fan Xpert 2+, – EZ update, – Lighting Control, ASUS CPU-Z, AI Charger, DAEMON Tools, MyASUS, Norton Anti-virus software (Free Trial version), WinRAR, UEFI BIOS, ASUS EZ DIY, – ASUS CrashFree BIOS 3, – ASUS EZ Flash 3, – ASUS UEFI BIOS EZ Mode, BIOS:, 256 Mb Flash ROM, UEFI AMI BIOS, Manageability:, WOL by PME, PXE, Operating System:, Windows 11 64-bit, Windows 10 64-bit |
| Package Contents | Accessories:, Cables, 2 x SATA 6Gb/s cables, Miscellaneous, 1 x ASUS Wi-Fi moving antennas, 1 x I/O Shield, 1 x M.2 SSD screw package, Installation Media, 1 x Support DVD, Documentation, 1 x User manual |
| Form Factor | Micro-ATX |
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