Model
Brand
ASUS
Model
PRIME B550M-A/CSM
Supported CPU
CPU Socket Type
AM4
CPU Type
Build in AMD AM4 Socket for 3rd Gen AMD Ryzen and 3rd Gen AMD Ryzen with Radeon Graphics Processors *
Chipsets
Chipset
AMD B550
Memory
Number of Memory Slots
4×288pin
Memory Standard
3rd Gen AMD Ryzen Processors
DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
3rd Gen AMD Ryzen with Radeon Graphics Processors
DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
Maximum Memory Supported
128GB
Channel Supported
Dual Channel
Expansion Slots
PCI Express 4.0 x16
3rd Gen AMD Ryzen Processors
1 x PCIe 4.0 x16 (x16 mode)
3rd Gen AMD Ryzen with Radeon Graphics Processors
1 x PCIe 3.0 x16 (x16 mode)
PCI Express x1
AMD B550 Chipset
2 x PCIe 3.0 x1 slots
* Support PCIe bifurcation for RAID on CPU function.
Storage Devices
SATA 6Gb/s
4 x SATA 6Gb/s
M.2
3rd Gen AMD Ryzen Processors:
1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 4.0 x4 and SATA modes) storage devices support
3rd Gen AMD Ryzen with Radeon Graphics Processors:
1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x4 and SATA modes) storage devices support
AMD B550 Chipset:
1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support
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 (4K@60HZ)
Onboard Audio
Audio Chipset
Realtek ALC887
Audio Channels
7.1 Channels
* A chassis with an HD audio module in the front panel is required to support 7.1-channel audio output.
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
1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
2 x Chassis Fan connector(s)
2 x Aura RGB Strip Headers
1 x Addressable Gen 2 header(s)
1 x SPI TPM header
1 x S/PDIF out header(s)
1 x Front panel audio connector(s) (AAFP)
1 x Clear CMOS jumper(s)
1 x System panel connector
1 x COM port header
1 x Speaker connector
