ASUS PRO B550M-C/CSM/AM4/mATX

Chipset: AMD B550

Dimensional format: mATX Form Factor (244 mm x 244 mm)
Processor Support: AMD AM4 Socket for AMD Ryzen ™ 5000 Series/4000 G-Series/3000 Series Desktop Processors
Processor socket: AM4
TPM 2.0 IC Onboard - TPM 2.0 chip directly on MB

Memory position: 4x DDR4 DIMM
Memory support:

• AMD Ryzen ™ 5000 Series/3000 Series Desktop 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
• AMD Ryzen ™ 4000 G-Series Desktop 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: Integrated Graphics Processor (based on processor)

• 2x DisplayPort
• 1x HDMI 2.1 (4K @ 60HZ)

Sound card:

• Realtek ALC887/897 7.1 Surround Sound High Definition Audio CODEC

Network card:

• Realtek RTL8111H 1Gb Ethernet

Expansion slots:

• AMD Ryzen ™ 5000 Series/3000 Series Desktop Processors
• 1x PCIe 4.0 x16 (x16 mode)
• AMD Ryzen ™ 4000 G-Series Desktop Processors
• 1x PCIe 3.0 x16 (x16 mode)
• AMD B550 Chipset
• 1x PCIe 3.0 x4
• 1x PCI

RAID controller: 0, 1, 10

SATA:

• 4x SATA 6Gb/s port (s)

M.2:

• AMD Ryzen ™ 5000 Series/3000 Series Desktop Processors:
• 1x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support
• AMD Ryzen ™ 4000 G-Series Processors:
• 1x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support
• AMD B550 Chipset
• 1x M.2_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) (1 x Type-A +1 x USB Type-C®)
• 2x USB 3.2 Gen 1 port (s) (2 x Type-A)
• 2x USB 2.0 port (s) (2 x Type-A)
• front USB ports (total 7)
• 4x USB 3.2 Gen 1 port (s) (4 x Type-A)
• 3x USB 2.0 port (s)

Internal ports:

• 1x CPU Fan connector (s)
• 2x Chassis Fan connector (s)
• 2x USB 3.2 Gen 1 (up to 5Gbps) connector (s) support (s) additional 4 USB 3.2 Gen 1 port (s)
• 2x USB 2.0 connector (s) support (s) additional 3 USB 2.0 port (s)
• 2x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)
• 1x M.2 with E key for Wi-Fi module
• 1x LPT header
• 4x SATA 6Gb/s connector (s)
• 1x Thunderbolt header (s)
• 1x 24-pin EATX Power connector (s)
• 1x 8-pin EATX 12V Power connectors
• 1x Front panel audio connector (s) (AAFP)
• 1x SMBus header (s)
• 1x System panel (s)
• 1x Clear CMOS jumper (s)
• 1x COM port header
• 1x Chassis intrusion header
• 1x LPC Debug header
• 1x Speaker connector

External ports:

• 1x Realtek® RTL8111H
• 1x PS/2 keyboard (purple)
• 1x PS/2 mouse (green)
• 2x DisplayPort
• 1x HDMI
• 2x USB 3.2 Gen 2 (1 x Type-A + 1 x USB Type-C®)
• 2x USB 3.2 Gen 1 Type-A
• 2x USB 2.0
• 3x Audio jack (s)

Package contents:

• 1x ACC Express Activation Key Card
• I/O Shield
• 2x SATA 6Gb/s cable (s)
• 1x Supporting DVD
• User manual
• 3x M.2 SSD screw package (s)
• 2x M.2 SSD Hex screw packages

BIOS: 256 Mb Flash ROM, UEFI AMI BIOS

Manufacturer website: https://www.asus.com/Motherboards-Components/Motherboards/All-series/Pro-B550M-C-CSM
https://www.asus.com/microsite/motherboard/ASUS-motherboards-Win11-ready/
https://www.asus.com/support/FAQ/1046215