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ASUS TUF GAMING B550-PLUS WIFI II AM4 AMD B550 ATX AMD Motherboard

Item #: 9SIVT66M4H9448
Mfr. Part #: TUF GAMING B550-PLUS WIFI II
UNSPSC: 43201513

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Option: TUF GAMING B550-PLUS WIFI II

ROG STRIX B550-F GAMING WIFI II
TUF GAMING B550-PLUS WIFI II
PRIME B550-PLUS AC-HES
PRIME B550M-A WIFI II
PRIME B550M-K WIFI

Supports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series Processors
AMD AM4 Socket and PCIe 4.0: The perfect pairing for 3rd Gen AMD Ryzen CPUs
Robust Power Design: 8+2 DrMOS power stages with high-quality alloy chokes and durable capacitors to provide reliable power for the last AMD high-count-core CPUs
Optimized Thermal Solution: Fanless VRM and PCH heatsink, multiple hybrid fan headers and fan speed management with Fan Xpert 4 or the UEFI Q-Fan Control utility
High-performance Gaming Networking: WiFi 6 (802.11ax), 2.5 Gb LAN with ASUS LANGuard
Best Gaming Connectivity: Supports HDMI 2.1 (4K@60HZ) and DisplayPort 1.2 output, featuring dual M.2 slots (NVMe SSD) - one with PCIe 4.0 x4 connectivity, front panel USB 3.2 Gen 1 connector, USB 3.2 Gen 2 Type-C & Type-A ports and Thunderbolt 3 header, 1 x SPI TPM header
Industry-leading Gaming Audio & AI Noise Cancelling Mic Technology: High fidelity audio from a SupremeFX S1220A codec with DTS S
DDR4 4866(OC)

Overview

Specs

Reviews (103)

TUF GAMING B550 PLUS WIFI II

Model
Brand	ASUS
Model	TUF GAMING B550-PLUS WIFI II

Supported CPU
CPU Socket Type	AM4
CPU Type	Supports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series Processors * * Refer to www.asus.com for CPU support list.

Chipsets
Chipset	AMD B550

Memory
Number of Memory Slots	4x288pin (DDR4)
Memory Standard	DDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3200 / 3000 / 2933 / 2800 / 2666 / 2400 / 2133* * 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
Memory Performance Profile	Intel XMP 2.0
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* * Supports x4 mode.
PCI Express x1	3 x PCIe 3.0 x1 * * PCIE 3.0 X16_2 runs x1 mode when any of the PCIe 3.0 x1 slots is occupied.

Storage Devices
Serial ATA (SATA)	6 x SATA 6Gb/s
M.2	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 Ryzen 5000 G-Series / 4000 G-Series Desktop Processors: 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)* * M2_2 shares bandwidth with SATA6G_56. When M.2_2 is populated, SATA6G_56 will be disabled.
SATA RAID	0/1/10

Onboard Video
Onboard Video Chipset	Supported only by CPU with integrated graphic

Onboard Audio
Audio Channels	7.1 Channels

Onboard LAN
LAN Chipset	Realtek 2.5Gb Ethernet
Max LAN Speed	2.5Gbps
Wireless LAN	Wi-Fi 6 802.11a/b/g/n/ac/ax
Bluetooth	Bluetooth 5.2

Rear Panel Ports
Back I/O Ports	2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x DisplayPort 1 x HDMI port 1 x ASUS Wi-Fi Module 1 x Realtek 2.5Gb Ethernet port 5 x Audio jacks 1 x Optical S/PDIF out port 1 x BIOS FlashBack button

Internal I/O Connectors
Onboard USB	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
Other Connectors	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) 3 x 4-pin Chassis Fan header(s) 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 SPI TPM header (14-1pin) 1 x 20-3 pin System Panel header 1 x Thermal Sensor header 1 x Thunderbolt header

Physical Spec
Form Factor	ATX
LED Lighting	RGB
Dimensions (W x L)	12.0" x 9.6"
Power Pin	1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector

Software Feature
Windows 11	Ready

Features
Features	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 - AURA RGB header(s) - Addressable Gen 2 RGB header(s) Software Features: ASUS Exclusive Software Armoury Crate - Aura Sync - Two-Way AI Noise Cancelation AI Suite 3 - Performance And Power Saving Utility TurboV EVO EPU Digi+ VRM Fan Xpert 4 PC Cleaner - EZ update - System Information Aura Creator TUF GAMING CPU-Z 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 BIOS: 256 Mb Flash ROM, UEFI AMI BIOS Manageability: WOL by PME, PXE Operating System: Windows 10 64-bit, Windows 11 64-bit

Packaging
Package Contents	Accessories: Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x I/O Shield 1 x M.2 Rubber Package(s) 1 x M.2 SSD screw package(s) 1 x TUF Gaming sticker 1 x ASUS 2x2 dual-band Wi-Fi moving antennas Installation Media 1 x Support DVD Documentation 1 x TUF Certification card 1 x User manual

Additional Information
First Listed on Newegg	August 14, 2026

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Item#: 9SIVT66M4H9448

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