Asus PRIME B550M-A/CSM mATX Motherboard Socket AM4 AMD B550 Chipset DDR4 4400MHz (Max 128GB) 2x M.2 Slots Realtek 7.1 Audio
Model #: PRIME B550M-A/CSM Item #: MOTASU550MAR
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Asus PRIME B550M-A/CSM mATX Motherboard Socket AM4 AMD B550 Chipset DDR4 4400MHz (Max 128GB) 2x M.2 Slots Realtek 7.1 Audio

was $134.95 Special Price $129.95

Technical Specs

Model  
Brand Asus
Model PRIME B550M-A/CSM
Supported CPU  
CPU Socket Type AM4
CPU Type Build in AMD AM4 Socket 3rd Gen AMD Ryzen Processors
Chipset  
Chipset AMD B550
Memory  
Number of Memory Slots 4x288pin
Memory Support  
Maximum Memory Supported 128GB
Channel Supported Dual Channel
Expansion Slots  
PCIe 4.0 x16 1
PCIe 3.0 x1 2
Storage Devices  
SATA 6GB/s 4 x SATA 6Gb/s
M.2 3rd Gen AMD Ryzen Processors

M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes)

AMD B550 Chipset

M.2_2 slot (Key M), type 2242/2260/2280/2280 (supports PCIe 3.0 x4 & SATA modes)
SATA RAID 0/1/10
Onboard Video  
Onboard Video Chipset Supported only by CPU with integrated graphic:
1 x D-Sub
1 x DVI-D
1 x HDMI 2.1 ([email protected])
Onboard Audio  
Audio Chipset Realtek ALC887
Audio Channels 7.1 Channels
Onboard LAN  
LAN Chipset Realtek RTL8111H
Max LAN Speed 10/100/1000Mbps
Rear Panel Ports  
Back 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 Realtek RTL8111H 1Gb Ethernet port
3 x Audio jacks
1 x PS/2 Keyboard/Mouse combo port
Internal I/O Connectors  
Onboard 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
Other 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


Miscellaneous

1 x AURA 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
Physical Spec  
Form Factor Micro ATX
LED Lighting RGB
Dimensions (W x L) 9.6" x 9.6"
Power Pin 1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
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Asus PRIME B550M-A/CSM mATX Motherboard Socket AM4 AMD B550 Chipset DDR4 4400MHz (Max 128GB) 2x M.2 Slots Realtek 7.1 Audio is available to buy in increments of 1