AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors
*Refer to www.asus.com for CPU support list.

B550

AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
DDR4
4866(O.C)/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 ECC and non-ECC, Un-buffered Memory *"
AMD Ryzen™ 4000 G-Series Processors
DDR4
5100(O.C)/4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz ECC and non-ECC, Un-buffered Memory"
OptiMem II
Dual Channel Memory Architecture
ECC Memory (ECC mode) support varies by CPU.
*Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).

1 x HDMI™ 2.1(4K@60HZ)
2 x Intel^® Thunderbolt™ 4 ports (USB Type-C^®) support DisplayPort 1.2/1.4 and Thunderbolt™ video outputs *
* Output at TBT4_E1 and TBT4_E2, the USB Type-C^® ports right under RJ45 ports, each requires a USB-C to DisplayPort adapter cable. Graphics specifications may vary between CPU types.
** VGA resolution support depends on processors' or graphic cards' resolution. For more details about the video input and output settings please refer to the user manual.

AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors
2 x PCIe 4.0 x16 (x16 or dual x8)*
AMD Ryzen™ 4000 G-Series Processor
2 x PCIe 3.0 x16 (x16 or dual x8)*
AMD B550 Chipset
1 x PCIe 3.0 x16 slot (supports x4 mode)**
2 x PCIe 3.0 x1 slots***
* Support PCIe bandwidth bifurcation for RAID on CPU function.
** PCIe 3.0 x4 will be switched from Thunderbolt™ 4 to PCIEX16_3 if the slot is populated; by then Thunderbolt™ 4 will have no output
*** These PCIe x1 slots share bandwidth with M.2_2, which runs at PCIe 3.0 x4 by default. You may go to BIOS setting to set M.2_2 to PCIe 3.0 x4 or x2 at will

Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors:
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes)
AMD RyzenTM 4000 G-Series Processor:
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes)
AMD B550 Chipset
M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes)
4 x SATA 6Gb/s ports
Supports RAID 0, 1, 10

2 x Intel^® 2.5Gb Ethernet
ASUS LANGuard

Rear USB: Total 8 ports
2 x Thunderbolt™ 4 port(s) (2 x USB Type-C^®) with up to 5V/3A, 15W charging support
4 x USB 3.2 Gen 2 port(s) (4 x Type-A)
2 x USB 2.0 port(s) (2 x Type-A)
Front USB: Total 7 ports
1 x USB 3.2 Gen 1 connector (support(s) USB Type-C^®)
1 x USB 3.2 Gen 1 header(s) support(s) additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 header(s) support(s) additional 4 USB 2.0 ports

Realtek S1220A 7.1 Surround Sound High Definition Audio CODEC*
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
- Supports up to 32-Bit/192 kHz playback*"
Audio Features
- Power pre-regulator reduces power input noise to ensure consistent performance
- Rear optical S/PDIF out port
- Premium Japanese audio capacitors
- Dedicated audio PCB layers
- Audio cover
- Unique de-pop circuit
* Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio.

2 x Thunderbolt™ 4 USB Type-C^® port(s)
4 x USB 3.2 Gen 2 port(s) (4 x Type-A)
2 x USB 2.0 port(s) (2 x Type-A)
1 x DisplayPort (Input only)
1 x HDMI™ port
2 x Intel^® I225-V 2.5Gb Ethernet ports
5 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack™ button
1 x PS/2 Keyboard/Mouse combo port

Fan and Cooling related
1 x 4-pin CPU Fan header(s)
1 x 4-pin CPU OPT Fan header(s)
1 x 4-pin AIO Pump header(s)
4 x 4-pin Chassis Fan header(s)
Power related
1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
1 x 4-pin +12V Power connector
Storage related
2 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
USB
1 x USB 3.2 Gen 1 connector (support(s) USB Type-C^®)
1 x USB 3.2 Gen 1 header(s) support(s) additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 header(s) support(s) additional 4 USB 2.0 ports
Miscellaneous
2 x AURA Addressable Gen 2 header(s)
2 x AURA RGB header(s)
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (AAFP)
1 x Speaker header
1 x SPI TPM header (14-1pin)
1 x 20-5 pin System Panel header
1 x Thermal Sensor header

Extreme Engine Digi+
- 5K Black Metallic Capacitors
ASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with Dr. MOS)
- Enhanced DRAM Overcurrent Protection
- ESD Guards
- LANGuard
- Overvoltage Protection
- SafeSlot Core
- Stainless-Steel Back I/O
ASUS Q-Design
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Latch
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Box Headers
- ProCool II
- Pre-mounted I/O shield
- SafeSlot
AURA Sync
- AURA RGB header(s)
- Addressable Gen 2 RGB header(s)
Bespoke Motherboard Design & Business Focused Features
- 24/7 Reliability
- Overcurrent Protection

ASUS Exclusive Software
Armoury Crate
- AURA Creator
- AURA Sync
- Two-Way AI Noise Cancelation
AI Suite 3
- 5-Way Optimization by Dual Intelligent Processors 5
TPU
EPU
Digi+ VRM
Fan Xpert 4
Turbo app
- EZ update
ASUS CPU-Z
IT Management software supported
- ASUS Control Center Express(ACCE)
ProArt Creator Hub
AI Charger
DAEMON Tools
Norton Anti-virus software (Free Trial version)
WinRAR
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
FlexKey

256 Mb Flash ROM, UEFI AMI BIOS

Cables
2 x SATA 6Gb/s cables
1 x DP to DP cable for Thunderbolt™ 4
Miscellaneous
1 x M.2 Rubber Package(s)
Installation Media
1 x Support DVD
Documentation
1 x ACC Express Activation Key Card
1 x User manual

Windows^® 11 64-bit, Windows^® 10 64-bit

ATX
30.5 x 24.4 cm