ASUS PRIME B550M-A/AM4/mATX

Chipset: AMD B550

Dimensional format: mATX Form Factor (244 mm x 244 mm)
Processor Support: AMD AM4 Socket 3rd Gen AMD Ryzen ™ Processors
Processor socket: AM4

Memory position: 4x DDR4 DIMM
Memory support:

• 3rd Gen AMD Ryzen ™ Processors - 4600 (OC)/4400 (OC)/4266 (OC)/4133 (OC)/4000 (OC)/3866 (OC)/3733 (OC)/3600 (OC)/3466 (OC) )/3333 (OC)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory
• Next Generation AMD Ryzen PRO Processors - 4800 (OC)/4600 (OC)/4466 (OC)/4400 (OC)/4266 (OC)/4133 (OC)/4000 (OC)/3866 (OC)/3733 (OC )/3600 (OC)/3466 (OC)/3333 (OC)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory

Max. RAM size: 128 GB
Support for memory type: DDR4

• Dual Channel Memory Architecture
• ECC Memory (ECC mode) support varies by CPU

Graphics card: (based on processor)

• 1x D-Sub
• 1x DVI-D
• 1x HDMI 2.1 (4K @ 60HZ)

Sound card:

• Realtek ALC887 7.1 Surround Sound High Definition Audio CODEC

Network card:

• Realtek RTL8111H 1Gb Ethernet

Expansion slots:

• 1x PCIe 4.0 x16 (x16 mode)
• 2x PCIe 3.0 x1

RAID controller: 0, 1, 10

SATA:

• 4x SATA 6Gb/s ports

M.2:

• 1x M.2 Socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 4.0 x4 and SATA modes) storage devices support
• 1x M.2 Socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support

USB:

• rear USB ports (total 6)
• 2x USB 3.2 Gen 2 port (s) (2 x Type-A)
• 4x USB 3.2 Gen 1 port (s) (4 x Type-A)
• front USB ports (total 6)
• 2x USB 3.2 Gen 1 port (s) (2 x Type-A)
• 4x USB 2.0 port (s) (4 x Type-A)

Internal ports:

• 1x CPU Fan connector (s)
• 1x CPU OPT Fan connector (s)
• 2x Chassis Fan connector (s)
• 2x Aura RGB Strip Headers
• 1x Addressable Gen 2 header (s)
• 1x USB 3.2 Gen 1 (up to 5Gbps) connector (s) support (s) additional 2 USB 3.2 Gen 1 port (s)
• 2x USB 2.0 connector (s) support (s) additional 4 USB 2.0 port (s)
• 1x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIe 4.0 x4 mode)
• 1x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)
• 1x SPI TPM header
• 4x SATA 6Gb/s connector (s)
• 1x S/PDIF out header (s)
• 1x 24-pin EATX Power connector (s)
• 1x 8-pin EATX 12V Power connectors
• 1x Front panel audio connector (s) (AAFP)
• 1x Clear CMOS jumper (s)
• 1x System panel connector
• 1x COM port header
• 1x Speaker connector

External ports:

• 1x PS/2 keyboard/mouse combo port (s)
• 1x DVI-D
• 1x D-Sub
• 1x HDMI
• 1x LAN (RJ45) port (s)
• 2x USB 3.2 Gen 2 (teal blue) (2 x Type-A)
• 4x USB 3.2 Gen 1 (blue) Type-A
• 3x Audio jack (s)

Package contents:

• I/O Shield
• 2x SATA 6Gb/s cable (s)
• 1x Supporting DVD
• User manual
• 1x M.2 SSD screw package (s)

BIOS: 256 Mb Flash ROM, UEFI AMI BIOS

Manufacturer website: https://www.asus.com/Motherboards/PRIME-B550M-A
https://www.asus.com/microsite/motherboard/ASUS-motherboards-Win11-ready/
https://www.asus.com/support/FAQ/1046215