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ASUS Prime series is expertly engineered to unleash the full potential of 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.
Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.
Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.
Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.
ASUS Prime B550M-A WIFI II mATX Socket AM4 Motherboard
CPU
| CPU Socket | Socket AM4 |
| CPU Brand | AMD |
| Installed Processors (Max) | 0 (1) |
| Supported Processor Manufacturer | AMD |
| Supported Processors | AMD Ryzen 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors |
| 64-bit Support | Yes |
| Socket | AM4 |
Rear Panel I/O Ports
| USB Ports | 2 x USB 3.1 4 x USB 3.0 |
| HDMI Port | 1 x HDMI 2.1 |
| VGA Port | 1 x D-Sub |
| Keyboard/Mouse Combo Port | 1 x PS/2 |
| RJ-45 Ports | 1 x RJ-45 |
| Digital Port | 1 x DVI-D |
| Audio Line In Ports | 1 x 3.5mm Jack |
| Audio Line Out Ports | 1 x 3.5mm Jack |
| Microphone In Port | 1 x 3.5mm Jack |
| Antenna Connector(s) | 2 x SMA Antenna |
Internal I/O Connectors
| SATA Connectors | 4 x SATA III |
| USB Connectors | 1 x USB 3.0 header (supports 2 ports) 2 x USB 2.0 headers (supports 4 ports) |
| Speaker | 1 x Speaker header |
| Front Panel Connectors | 1 x Front Panel 1 x Front Audio |
| Cooling Fan Support | 1 x CPU fan header 1 x CPU OPT fan header 2 x Chassis fan headers |
| Serial Connectors | 1 x COM header |
| TPM Header | 1 x SPI TPM header |
| Power Connector Port | 1 x 24-pin ATX 1 x 8-pin EPS |
| Other Connectors | 1 x M.2 slot, Key M, Type 2242/2260/2280/22110 (PCIe Gen4 or SATA) 1 x M.2 slot, Key M, Type 2242/2260/2280/22110 (PCIe Gen3 or SATA) 1 x M.2 slot, Key M, Type 2242/2260/2280 (PCIe Gen3 or SATA) 1 x 3-pin ARGB LED headers 2 x 4-pin RGB LED headers |
Memory
| Memory Bus Speed | Up to 4866 MHz |
| Memory Type | DDR4 |
| Maximum RAM | 128 GB |
| Memory Slot | 4 x DIMM |
Motherboard
| Northbridge | AMD B550 |
| RAID Supported | Yes |
| RAID Format | RAID 0, 1, 10 |
| SATA Supported | Yes |
Expansion
| Number of PCI Express Slots | 1 x PCI Express 4.0 x16 slot 2 x PCI Express 3.0 x1 slots |
Graphics Device
| Integrated Graphics Supported | Yes |
Warranty
| Warranty | 3 Years |
Sound
| Integrated Sound | Realtek |
Network
| Integrated Network | Realtek |
| Network Speeds Supported | Up to 1 Gbps |
| Wireless LAN | Yes (Wi-Fi 6) |
| Bluetooth | Yes |
| Bluetooth Version | 5.2 |
System Requirements
| Operating Systems Supported | Microsoft Windows 11 / 10 64-bit |
System
| Jumpers | 1 x Clear CMOS |
| Software Included (may be trial or restricted) | Yes |
| Drivers | Yes |
Physical
| Form Factor | mATX Motherboard |
| In The Box | Motherboard 2 x SATA Cables ASUS Wi-Fi Moving Antennas I/O Shield M.2 SSD Screw Package Support DVD User Manual |
| Width | 244 mm |
| Length | 244 mm |
Key Features
| Wireless Network | Yes |
| Motherboard Width | 244 mm |
| Motherboard Height | 244 mm |
| mSATA Supported | No |
| U.2 Supported | No |
| Chipset Manufacturer | AMD |
| Memory Channel | Dual |
| On-board Audio Type | 7.1 |
| Number of SATA Ports | 4 port(s) |
| Number of USB Ports | 6 port(s) |
| SATA III Support | Yes |
| USB 3.0 Support | Yes |
| Multi GPU Support | No |
| VGA Connection | Yes |
| DVI Connection | Yes |
| HDMI Connection | Yes |
| DisplayPort Connection | No |
| Motherboard Form Factor | mATX |
| Motherboard (EPS) Power Connectors | 4+4-Pin |
| Motherboard Chipset | AMD B550 |
| Thunderbolt | No |
| Motherboard Model | ASUS Prime B550M-A WIFI II |
| WiFi Speed | 2400 Mbps |
| USB 3.1 Support | Yes |
| Internal USB3.0 Header | Yes |
| M.2 Support | Yes |
| On-board RGB Control | ASUS Aura Sync |
| Memory Speed | 4866 MT/s |
| RGB Header Type | 3-Pin ARGB |
| Addressable RGB | Yes |
| Internal USB Type-C Header | No |
| Power Requirement (auto) | 60 W |
| Max Memory Speed Supported (Non-overclocked) | 3200 MT/s |
| Max Memory Speed Supported (overclocked) | 4866 MT/s |
| CPU Power Pins (female) | 8 |
| Total M.2 Slots | 2 |
| Maximum NVMe M.2 ports | 2 |
| Maximum SATA M.2 ports | 2 |
| SATA ports | 4 |
| No. of front USB2.0 ports supported | 4 |
| No. of front USB3.0 ports supported | 2 |
Item Details
| Manufacturer | ASUS |
| Manufacturer Code | 90MB19X0-M0EAY0 |
| Alternative Part Number | PRIME B550M-A WIFI II |
| EAN | 4711081309741 |
| UPC | 195553309745 |
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