ASUS PRIME B550M-A AC AMD AM4 mATX motherboard with impressive features, including PCIe 4.0, dual M.2 slots, WiFi, HDMI, D-Sub, DVI, SATA 6 Gbps, USB 3.2 Gen 2 ports, and Aura Sync RGB lighting
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.
Maximum Memory Supported
128GB
Channel Supported
Dual Channel
ECC Supported
ECC Memory (ECC mode) support varies by CPU.
Buffer Supported
Un-buffered
Expansion Slots
PCI Express 4.0 x16
1 x PCI Express 4.0 x16*
* Actual support may vary by CPU.
PCI Express 3.0 x16
1 x PCI Express 3.0 x16
PCI Express x16
None
PCI Express x1
2 x PCIe 3.0 x1
Storage Devices
SATA 6Gb/s
4 x SATA 6Gb/s
M.2
AMD Ryzen 5000 Series / 3000 Series Desktop 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 AMD Ryzen 5000 G-Series / 4000 G-Series Desktop 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
Onboard Audio
Audio Chipset
Realtek ALC887/897
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
1Gbps
Wireless LAN
Wi-Fi 802.11 a/b/g/n/ac
Bluetooth
Bluetooth 5.0
Rear Panel Ports
Back I/O Ports
1 x PS/2 keyboard/mouse combo port(s) 1 x DVI-D 1 x D-Sub 1 x HDMI 1 x LAN (RJ45) port(s) 2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A) 4 x USB 3.2 Gen 1 (blue) Type-A 3 x Audio jack(s) 1 x ASUS Wi-Fi Module
HDMI
1 x HDMI
USB 3.0
2 x USB 3.0
Internal I/O Connectors
Onboard USB
1 x USB 3.2 Gen 1 (up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
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
Physical Spec
Form Factor
Micro ATX
LED Lighting
RGB
Dimensions (W x L)
9.6" x 9.6"
Power Pin
1 x 24-pin EATX Power connector(s) 1 x 8-pin EATX 12V Power connectors
Features
Features
Software Features: ASUS Exclusive Software Armoury Crate - Aura Creator - Aura Sync AI Suite 3 - Performance And Power Saving Utility TurboV EVO EPU Digi+ VRM Fan Xpert 2+ - EZ update ASUS CPU-Z AI Charger DAEMON Tools Norton Anti-virus software (Free Trial for 60 days) WinRAR UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode
ASUS Special Features: ASUS 5X PROTECTION III - ASUS DIGI+ VRM - ASUS LANGuard - ASUS Overvoltage Protection - ASUS SafeSlot Core - ASUS Stainless-Steel Back I/O ASUS Q-Design - ASUS Q-DIMM - ASUS Q-Slot ASUS Thermal Solution - Aluminum heatsink design AURA Sync - Standard RGB headers - Addressable Gen 2 RGB header ASUS Lighting Control
BIOS: 256 Mb Flash ROM, UEFI AMI BIOS
Manageability: WOL by PXE
Operating System: Windows 10 64-bit
Packaging
Package Contents
Accessories: I/O Shield 2 x SATA 6Gb/s cable(s) 1 x Supporting DVD User manual 1 x Wi-Fi moving antenna 1 x M.2 SSD screw package(s)