Asus PRIME B550M-A WIFI II Desktop Motherboard - AMD B550 Chipset Socket AM4 Micro ATX Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9, Ryzen 5 Pro, Ryzen 7 PRO, Ryzen 9 PRO, Ryzen 3 PRO Processor Supported 128 GB DDR4 SDRAM Maximum RAM DIMM, UDIMM 4 x Mem

• Chipset Manufacturer:
  AMD
  
• Chipset Model:
  B550
  
• Total Processor Supported:
  1
  
• Processor Socket:
  Socket AM4
  
• Processor Supported:
  Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9, Ryzen 5 Pro, Ryzen 7 PRO, Ryzen 9 PRO, Ryzen 3 PRO
  

• Number of Memory Slots:
  4
  
• Memory Form Factor:
  DIMM, UDIMM
  
• Maximum Memory Supported:
  128 GB
  
• Memory Speed Supported:
  2133 MHz, 2400 MHz, 2667 MHz, 2800 MHz, 3000 MHz, 3200 MHz, 3333 MHz, 3466 MHz, 3866 MHz, 3600 MHz, 3733 MHz, 4000 MHz, 4133 MHz, 4466 MHz, 4600 MHz, 4400 MHz, 4800 MHz, 4266 MHz, 4866 MHz, 4333 MHz
  
• Memory Technology:
  DDR4 SDRAM
  

• Controller Type:
  Serial ATA/600
  
• RAID Supported:
  Yes
  
• RAID Levels:
  0, 10, 1
  

• Onboard Video:
  CPU Dependent Video
  

• Audio Channels:
  7.1
  

• Bluetooth:
  Yes
  
• Gigabit Ethernet:
  Yes
  
• Wireless LAN:
  Yes
  
• Wireless LAN Standard:
  IEEE 802.11 a/b/g/n/ac/ax
  

• Total Number of Expansion Slots:
  3
  
• Total Number of PCI Express Slots:
  3
  
• Number of PCI Express x1 Slots:
  2
  
• Number of PCI Express x16 Slots:
  1
  

• Total Number of USB Ports:
  6
  
• Number of USB 3.2 Ports:
  6
  
• VGA:
  Yes
  
• HDMI:
  Yes
  
• DVI:
  Yes
  
• Number of Network (RJ-45) Ports:
  1
  

• Number of SATA Interfaces:
  4
  
• Number of M.2 Interfaces:
  2
  
• Total Number of Onboard USB Ports:
  6
  
• Number of Onboard USB 2.0 Ports:
  4
  
• Number of Onboard USB 3.2 Ports:
  2
  
• Onboard S/PDIF Header:
  Yes
  

• Form Factor:
  Micro ATX
  
• Width:
  9.6"
  
• Depth:
  9.6"
  

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 at 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 and 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 and SATA modes)
AMD B550 Chipset
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 and SATA modes)
4 x SATA 6Gb/s ports
Support RAID 0, 1, 10
Ethernet
1 x Realtek 1Gb Ethernet
ASUS LANGuard
Wireless and 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
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
Form Factor
microATX
24.4cm x 24.4cm
Item Dimension (L"xW"xH")
11 x 11 x 3

Weight
3 lbs

Warranty Information
3 Years