Overvoltage Protection
World-class circuit-protecting power design
An exclusive circuit design with built-in voltage regulators to protect your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.
DRAM Overcurrent Protection
Short-circuit damage prevention
Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM to safeguard the lifespan of your system and connected devices.
Stainless-Steel Back I/O
3X corrosion-resistance for greater durability
Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide have a lifespan that's three times longer than ordinary panels.
LANGuard
Pumped-up throughput 2.5X higher surge tolerance
ASUS LANGuard is a hardware-level network protection feature that integrates advanced signal-coupling technology and premium anti-EMI surface-mounted capacitors to improve throughput and ensure a more reliable connection.
SPECIFICATIONS:
| Model | PRIME B550M-A WIFI II |
| CPU | AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors |
| *Refer to www.asus.com for CPU support list. | |
| Chipset | B550 |
| Memory | 4 x DIMM, Max. 128GB, 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, Un-buffered Memory* |
| Dual Channel Memory Architecture | |
| * ECC memory (ECC mode) support varies by CPU. | |
| * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types. | |
| Graphics | 1 x D-Sub port |
| 1 x DVI-D port | |
| 1 x HDMI® port** | |
| * Graphics specifications may vary between CPU types. | |
| ** Supports 4K@60Hz as specified in HDMI 2.1. | |
| Expansion Slots | AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors |
| 1 x PCIe 4.0 x16 slot (supports x16 mode) | |
| AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors | |
| 1 x PCIe 3.0 x16 slot (supports x16 mode) | |
| AMD B550 Chipset | |
| 2 x PCIe 3.0 x1 slots | |
| Storage | Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports |
| 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™ 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) | |
| 4 x SATA 6Gb/s ports | |
| Support RAID 0, 1, 10 | |
| Ethernet | 1 x Realtek 1Gb Ethernet |
| ASUS LANGuard | |
| Wireless & Bluetooth | 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) + BT5.2 |
| Wi-Fi 6 | |
| 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) | |
| Supports 2.4/5GHz frequency band | |
| Bluetooth v5.2 | |
| USB | Rear USB:Total 6 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) | |
| Front USB:Total 6 ports | |
| 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 | |
| Audio | Realtek 7.1 Surround Sound High Definition Audio CODEC* |
| - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking | |
| - Supports up to 24-Bit/192 kHz playback | |
| Audio Features | |
| - Audio Shielding | |
| - LED-illuminated audio trace path design | |
| - Premium audio capacitors | |
| - Dedicated audio PCB layers | |
| * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. | |
| Back Panel 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 | |
| Internal I/O 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 | |
| Power related | |
| 1 x 24-pin Main Power connector | |
| 1 x 8-pin +12V Power connector | |
| Storage related | |
| 2 x M.2 slots (Key M) | |
| 4 x SATA 6Gb/s ports | |
| 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 | |
| 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 | |
| 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 |
| 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 | |
| Operating System | Windows® 11, Windows® 10 64-bit |
| Form Factor | microATX |
| 24.4cm x 24.4cm |