AMD B550 (Ryzen AM4) ATX gaming motherboard with PCIe 4.0, dual M.2, 14 DrMOS power stages, 2.5 Gb Ethernet, HDMI, DisplayPort, SATA 6 Gbps, Front USB Type-C®, USB 3.2 Gen 2 Type-A and Type-C®, and Aura Sync RGB lighting support
AMD AM4 socket: Ready for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series desktop processors
Enhanced power solution: 12+2 DrMOS power stages, 8+4 pin ProCool sockets, military-grade TUF components, and Digi+ VRM for maximum durability
Comprehensive cooling: VRM heatsink, PCH fanless heatsink,dual M.2 heatsink, hybrid fan headers and Fan Xpert 4 utility
Next-gen connectivity: PCIe 4.0 M.2,Front USB Type-C®, USB 3.2 Gen 2 Type-A and Type-C® support
Made for online gaming: 2.5 Gb Ethernet, TUF LANGuard, and Turbo LAN technology
Realtek S1200A codec: Pristine audio quality with unprecedented 108 dB signal-to-noise ratio for stereo line out and 103 dB SNR for line in
Two-Way AI Noise Cancelation: Provides crystal-clear in-game voice communication

CPU
AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors *
* Refer to www.asus.com for CPU support list
Chipset
AMD B550
Memory
4 x DIMM, Max. 128GB, DDR4 5100(O.C)/5000(O.C)/4866(O.C)/4800(O.C.)/4600(O.C)/4500(O.C)/4400(O.C)/4333(O.C.)/4266(O.C.)/4200(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory
Dual Channel Memory Architecture
ECC Memory (ECC mode) support varies by CPU.
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.
Graphic
1 x DisplayPort 1.2
1 x HDMI 2.1(4K@60HZ)
*Graphics specifications may vary between CPU types.
Multi-GPU Support
Supports AMD 2-Way CrossFireX Technology
Expansion Slots
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
1 x PCIe 4.0 x16 (x16 mode)
AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors
1 x PCIe 3.0 x16 (x16 mode)
AMD B550 Chipset
1 x PCIe 3.0 x16 (x4 mode)
3 x PCIe 3.0 x1
* Support PCIe bifurcation for RAID on CPU function.
Storage
Total supports 2 x M.2 slot(s) and 6 x SATA 6Gb/s ports
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors :
1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support(SATA & PCIe 4.0 x4 mode)
AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors :
1 x M.2 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 Socket 3, with M Key, Type 2242/2260/2280/22110(PCIE 3.0 x4 and SATA modes) storage devices support*2
6 x SATA 6Gb/s port(s),
Support Raid 0, 1, 10
LAN
Realtek RTL8125B 2.5Gb Ethernet
TUF LANGuard
Audio
Realtek ALC S1200A 7.1 Surround Sound High Definition Audio CODEC
- Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback
Audio Feature :
- Exclusive DTS Custom for GAMING Headsets.
- Optical S/PDIF out port(s) at back panel
- Audio cover
- Audio Shielding
- Dedicated audio PCB layers
- Premium Japanese audio capacitors
- Unique de-pop circuit
USB Ports
Rear USB Port ( Total 8 )
2 x USB 3.2 Gen 2 port(s)(1 x Type-A +1 x USB Type-C®)
2 x USB 3.2 Gen 1 port(s)(2 x Type-A)
4 x USB 2.0 port(s)(4 x Type-A)
Front USB Port ( Total 7 )
3 x USB 3.2 Gen 1 port(s)(2 x Type-A +1 x Type-C)
4 x USB 2.0 port(s)(4 x Type-A)
Software Features
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Two-Way AI Noise Cancelation
AI Suite 3
- Performance And Power Saving Utility
TurboV EVO
EPU
Digi+ VRM
Fan Xpert 4
- EZ update
TUF GAMING CPU-Z
AI Charger
ASUS Turbo LAN
DAEMON Tools
DTS Custom for GAMING Headsets
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 TUF PROTECTION
- ASUS DIGI+ VRM (Digital power design with Dr. MOS)
- ASUS Enhanced DRAM Overcurrent Protection
- ASUS ESD Guards
- TUF LANGuard
- ASUS Overvoltage Protection
- ASUS SafeSlot
- ASUS Stainless-Steel Back I/O
ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Procool
AURA Sync
- Standard RGB headers
- Addressable Gen 2 RGB header
Back I/O Ports
1 x DisplayPort
1 x HDMI
1 x LAN (2.5G) port(s)
2 x USB 3.2 Gen 2 (teal blue) (1 x Type-A+1 x USB Type-C®)
2 x USB 3.2 Gen 1 (blue) Type-A
4 x USB 2.0 (one port can be switched to USB BIOS FlashBack™)
1 x Optical S/PDIF out
5 x Audio jack(s)
1 x BIOS FlashBack™ Button(s)
Internal I/O Ports
1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
3 x Chassis Fan connector(s)
1 x AIO_PUMP connector
2 x Aura RGB Strip Headers
2 x Addressable Gen 2 header(s)
1 x USB 3.2 Gen 1 front panel TypeC™ connector
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)
1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support(SATA & PCIe 4.0 x4 mode)
1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
1 x SPI TPM header
6 x SATA 6Gb/s connector(s)
1 x Thunderbolt header(s)
1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
1 x 4-pin ATX 12V Power connector(s)
1 x Front panel audio connector(s) (AAFP)
1 x Thermal sensor connector(s)
1 x Clear CMOS jumper(s)
1 x System panel connector
1 x COM port header
Accessories
User´s manual
I/O Shield
2 x SATA 6Gb/s cable(s)
1 x Supporting DVD
1 x TUF Gaming Sticker
1 x TUF Certification card(s)
1 x M.2 SSD screw package(s)
1 x M.2 Rubber Package(s)
BIOS
256 Mb Flash ROM, UEFI AMI BIOS
Manageability
WOL by PXE
Operating System
Windows® 10 64-bit
Form Factor
ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )
Note
*1 PCIE 3.0 X16_2 runs x1 mode when any of the PCIe 3.0 x1 slots is occupied.
*2 M2_2 shares bandwidth with SATA6G_56. When M.2_2 is populated, SATA6G_56 will be disabled.