ASUS ROG STRIX B550-A GAMING/AM4/ATX

Chipset: AMD B550

Dimensional format: ATX Form Factor (305 mm x 244 mm)
Processor Support: AMD AM4 Socket for AMD Ryzen ™ 5000 Series/4000 G-Series/3000 Series Desktop Processors
Processor socket: AM4

Memory position: 4x DDR4 DIMM
Memory support:

• 5100 (OC)/4800 (OC)/4600 (OC)/4400 (OC)/4133 (OC)/4000 (OC)/3866 (OC)/3600 (OC)/3466 (OC)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory
• 4600 (OC)/4400 (OC)/4133 (OC)/4000 (OC)/3866 (OC)/3600 (OC)/3466 (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

• Integrated Graphics Processor (based on processor)

Multi GPU: AMD 2-Way CrossFireX Technology

Sound card:

• ROG SupremeFX8-Channel High Definition Audio CODEC S1220A

Network card:

• Intel® I225-V 2.5Gb Ethernet (ASUS LANGuard)

Expansion slots:

• 3x PCIe 3.0 x1
• 1x PCIe 4.0 x16 (x16 mode)
• 1x PCIe 3.0 x16 (x16 mode)

RAID controller: 0, 1, 10

SATA:

• 6x SATA 6Gb/s

M.2:

• 1x M.2 Socket 1 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIe 4.0 x4 mode)
• 1x M.2 Socket 2 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)

USB:

• rear USB ports (total 8)
• 2x USB 3.2 Gen 2 (1 x Type-A + 1 x USB Type-C®)
• 4x USB 3.2 Gen 1
• 2x USB 2.0
• front USB ports (total 6)
• 2x USB 3.2 Gen 1 port (s)
• 4x USB 2.0 port (s)

Internal ports:

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

External ports:

• 1x BIOS FlashBack ™ Button (s)
• 2x USB 3.2 Gen 2 (1 x Type-A + 1 x USB Type-C®)
• 1x Intel® I225-V 2.5Gb Ethernet
• 4x USB 3.2 Gen 1
• 1x DisplayPort
• 1x HDMI
• 2x USB 2.0
• 1x Optical S/PDIF out
• 5x Gold-plated audio jacks

Package contents:

• 1 x M.2 SSD screw package (s)
• 1x M.2 Rubber Package (s)
• User´s manual
• 4x SATA 6Gb/s cable (s)
• 1x Supporting DVD
• 1x ROG Strix stickers
• 1x Cable ties pack (s)
• 1x Extension cable for Addressable LED
• 1x ROG Thank you card

BIOS: 256 Mb Flash ROM, UEFI AMI BIOS

Manufacturer site: https://rog.asus.com/motherboards/rog-strix/rog-strix-b550-a-gaming-model/
https://www.asus.com/microsite/motherboard/ASUS-motherboards-Win11-ready/
https://www.asus.com/support/FAQ/1046215