Asus PRIME B550M-A AC Motherboard

AMD AM4 mATX motherboard with PCIe 4.0, dual M.2, WiFi, HDMI, D-Sub, DVI, SATA 6 Gbps, USB 3.2 Gen 2 ports, Aura Sync RGB lighting

• AMD AM4 socket: Ready for Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors
• Comprehensive cooling: VRM heatsink, PCH heatsink, Fan Xpert 2+
• Ultrafast connectivity: Dual M.2, PCIe 4.0, 802.11ac Wi-Fi, USB 3.2 Gen 2 Type-A
• Aura Sync RGB: Synchronizable LED effects across a vast portfolio of compatible PC gear, including addressable RGB strips

Tune It Your Way

Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.

All-around Energy Efficiency

With the Energy Processing Unit (EPU), you'll enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode.

Flexible Cooling Controls

Fan Xpert 2+ software provides comprehensive control over system fans. Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.

Precise Digital Power Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance.

UEFI BIOS

The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans.

Advanced Tuning for Serious Tweakers

An intuitive Advanced mode offered via the UEFI lets you take complete control. A built-in search feature makes it easy to find options, and various Advanced functions let you intelligently make nuanced adjustments so you can dial in performance just the way you want.

Quick and Simple Setup

EZ mode displays vital settings and stats and also offers guided wizards, drag-and-drop functionality, and one-click application of important settings — all to help you get your rig up and running in no time.

Cool to the Core

Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

VRM Heatsink and Thermal Pads

A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs and chokes for better cooling performance.

Cooler by Design

Prime B550 series features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.

Build on a Solid Foundation

Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.

PCIe 4.0 M.2 (up to 64 Gbps)

Achieve speed with onboard M.2

PCIe 4.0 M.2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost. Create a RAID configuration with up to PCIe 4.0 storage device to enjoy the fastest data-transfer speeds on the 3rd Generation AMD Ryzen platform.

802.11ac Wi-Fi

PRIME B550M-A AC has 802.11ac Wi-Fi with 1x1 2.4/5GHz antennas for up to 433.3Mbps* transfer speeds to ensure that every connected user experiences the best wireless and online speeds!

* Actual speed varies, and depends on networking conditions.

USB 3.2 Gen 2 Type-A

Numerous USB ports support high-end rigs loaded with peripherals, including two rear-panel USB Type-A connectors with fast USB 3.2 Gen 2 connectivity for compatible cases.

Little Things Make a Big Difference

Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.

Outstanding Audio

Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.

Audio Shielding

Separates analog/digital signal domains, significantly reducing multi-lateral interference.

Separate Layer for Left and Right Tracks

Ensures minimal crosstalk between audio paths.

Premium Japanese Capacitors

Premium parts provide an immersive sound signature, with exceptional fidelity.

Addressable Gen 2 RGB Header

The addressable Gen 2 RGB header is now capable of detecting the number of LEDs on second-gen addressable RGB devices, allowing the software to automatically tailor lighting effects to specific devices. The new header also offers backward-compatibility with existing Aura RGB gear.

Armoury Crate

Armoury Crate is a new software utility designed to give you centralized control of supported products. From a single intuitive interface, Armoury Crate allows you to easily customize RGB lighting and effects for every compatible device in your arsenal. The software also provides control of settings for ASUS products, including keyboard and mouse preferences. Armoury Crate even features dedicated product registration and highlight to help you stay in touch with the ASUS community.

Make and Model	Asus PRIME B550M-A AC Motherboard
Part Number	192876848401
Color	Black
CPU	AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 5000 G-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 4866(O.C) / 4800(O.C.) / 4600(O.C) / 4466(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 / 2933 / 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 D-Sub 1 x DVI-D 1 x HDMI 2.1(4K@60HZ)
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 2 x PCIe 3.0 x1
Storage	Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports 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 4 x SATA 6Gb/s port(s), Support Raid 0, 1, 10
LAN	Realtek RTL8111H 1Gb Ethernet
Wireless Data Network	Wi-Fi 802.11 a/b/g/n/ac Supports dual band frequency 2.4/5 GHz Supports PCIe interface
Bluetooth	Bluetooth® 5.0
Audio	Realtek ALC887/897 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: - LED-illuminated design - Audio Shielding - Dedicated audio PCB layers - Premium Japanese audio capacitors * Choose the chassis with HD audio module in front panel to support 8-channel audio output.
USB Ports	Rear USB Port ( Total 6 ) 2 x USB 3.2 Gen 2 port(s)(2 x Type-A) 4 x USB 3.2 Gen 1 port(s)(4 x Type-A) Front USB Port ( Total 6 ) 2 x USB 3.2 Gen 1 port(s)(2 x Type-A) 4 x USB 2.0 port(s)(4 x Type-A)
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
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
Internal I/O Ports	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 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 storage devices support (SATA & PCIE 3.0 x 4 mode) 1 x SPI TPM header 4 x SATA 6Gb/s connector(s) 1 x S/PDIF out header(s) 1 x 24-pin EATX Power connector(s) 1 x 8-pin EATX 12V Power connectors 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
BIOS	256 Mb Flash ROM, UEFI AMI BIOS
Manageability	WOL by PXE
Operating System	Windows® 10 64-bit
Form Factor	mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )
Weight	N/A
Note	*A chassis with an HD audio module in the front panel is required to support 7.1-channel audio output.

• 1 x Asus PRIME B550M-A AC Motherboard
• 1 x I/O Shield
• 2 x SATA 6Gb/s cable(s)
• 1 x Supporting DVD
• 1 x User manual
• 1 x Wi-Fi moving antenna
• 1 x M.2 SSD screw package(s)