ASUS PRIME B840-PLUS WIFI DDR5 Motherboard - Black

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840-PLUS WIFI motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.

Performance

AI Solutions

ASUS AI Solutions include AI Cache Boost to supercharge large language model (LLM) workflows, ASUS AI Advisor as your technical expert with expertise in PC performance.

AI Cache Boost

Supercharge your large language model (LLM) workflows with AI Cache Boost. Exclusive to ASUS AMD 800 and 600 series motherboards that use Ryzen™ 9000 Series CPUs, this BIOS setting optimizes CPU cache and memory pathways to deliver up to 29% faster local LLM performance with high-speed memory tuning.

AI Advisor

ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.

Digital Power Design

PRIME B840-PLUS WIFI features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use.
The multi-layered printed circuit board design quickly dissipates heat around the voltage regulators to improve overall system stability and provide the CPU with more overclocking headroom.
The Power Saving function contains several settings to easily optimize power consumption and maximize energy savings. You can enable a CPU power limit, darken Aura lighting and set the fan profile to a Power Saving mode. You can also toggle the Power Saver plan that is built into Microsoft Windows.
The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.

Enhanced Memory & Storage Performance

Enhanced DDR5 performance
- Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B840-PLUS WIFI maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits.
- For entry-level modules without EXPO™ support, ASUS Enhanced Memory Profile (AEMP) automatically detects memory chips and provides optimized profiles for enhanced performance.
- For those looking to surpass stock DDR5 speeds, the PRIME B840-PLUS WIFI offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.
Three M.2 slots (up to 64 Gbps)
- PRIME B840-PLUS WIFI offers a total of three M.2 slots, including two that support data-transfer speeds of up to 64 Gbps via PCIe 4.0, and one that supports PCIe 3.0. This enables quicker boot-up and app load times with OS or application drives.

Cooling

Cooler by design

The PRIME B840-PLUS WIFI motherboard is engineered with multiple onboard heatsinks and an array of hybrid fan headers to help ensure your rig stays cool and stable under intense workloads.

Smart Cooling precision

ASUS Fan Xpert 2+
- ASUS Fan Xpert 2+ software provides comprehensive control over fans. An 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.

Cooler compatibility

ASUS AIO coolers offer robust performance, high overclocking potential, bold aesthetics and customizable functionality for new motherboards, empowering you to build your dream gaming rig.

Flexibility

Empowering connections

This motherboard offers a versatile range of connectivity, including support for WiFi 6E, PCIe 4.0 slot and an arsenal of USB ports which includes Type-C® connections.

WiFi 6E

Built-in WiFi 6E4 technology takes advantage of the newly available radio spectrum in the 6 GHz band. With triple the bandwidth of the 2.4/5/6 GHz band, WiFi 6E delivers ultrafast wireless networking speeds with improved capacity and better performance in dense wireless environments.

Realtek 2.5 Gb Ethernet

Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.

USB 10Gbps Type-C®

A batch of USB ports support high-end rigs loaded with peripherals, including a rear USB Type-C® connector with ultrafast USB 10Gbps for transmission speeds of up to 10Gbps.

Customization

Personalization

The PRIME B840-PLUS WIFI enhances the user experience across the board, from simplifying BIOS setting adjustments to offering customizable RGB lighting controls for a uniquely personal system aesthetic.

UEFI BIOS

The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.

ASUS GlideX

Enable seamless screen sharing and control across PCs, tablets, and smartphones via wired or wireless connections, supporting multiple platforms.

ASUS DriverHub

Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.

Armoury Crate

Customize Aura Sync RGB and control ASUS devices. Includes product registration and updates.

Aura Sync

Complete RGB lighting control for enthusiast systems, ensuring seamless synchronization with compatible hardware.

Addressable Gen 2 RGB headers

Three addressable Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.

DIY friendly

The PRIME B840-PLUS WIFI motherboard features EZ PC DIY innovations that simplify and speed up the PC building process, making DIY easy and convenient.
Q-Antenna: With Q-Antenna, attaching a WiFi antenna to your PC is now easy and fast. Instead of slowly rotating two fasteners until they finally lock in, they just snap into place. Less hassle, and more consistent performance.
Q-LED Core: The Q-LED Core display produces color-coded lights during the Power-On Self-Test (POST) that can help you troubleshoot potential issues.
Pre-Mounted I/O Shield: Our pre-installed I/O shield safeguards ports, simplifies the build process, increases functionality and enhances aesthetics for PC DIY enthusiasts.
BIOS FlashBack™: BIOS FlashBack™ simplifies BIOS updates. Just load the BIOS file onto a FAT32 USB stick, insert it into the BIOS FlashBack™ port, and press a button—no CPU or memory needed.
SafeSlot Core+: SafeSlot Core+ is a one-piece stainless-steel brace that shields the slot to protect it from damage. The metal cover is tightly secured to the slot with hooks, and the entire assembly is firmly anchored to the PCB with strengthened solder points to provide a secure foundation for heavyweight graphics cards.

Specifications

Model
- PRIME B840-PLUS WIFI
CPU
- AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
- Supports up to AMD 170W CPU
Chipset
- AMD B840 Chipset
Memory
- 4 x DIMM slots, max. 256GB, DDR5 Supports up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM*
- Dual channel memory architecture
- Supports AMD Extended Profiles for Overclocking (EXPO™)
- ASUS Enhanced Memory Profile (AEMP)
- *Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Graphics
- 1 x DisplayPort
- 1 x HDMI™ port***
- *Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
- Supports max. 8K@30Hz as specified in DisplayPort 1.4.
- ***Supports 4K@60Hz as specified in HDMI 2.1.
Expansion Slots
- AMD Ryzen™ 9000 & 7000 Series Desktop Processors*
  - 1 x PCIe 4.0 x16 slot (supports x16 mode)
- AMD Ryzen™ 8000 Series Desktop Processors
  - 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
- AMD B840 Chipset
  - 1 x PCIe 3.0 x16 slot (support x4 mode)***
  - 2 x PCIe 3.0 x16 slots (support x1 mode)***
  - 1 x PCIe 3.0 x1 slot***
- Note:
  - Specifications vary by CPU types.
  - ***The PCIEX16(G3)_1/3 and PCIEX1(G3) share bandwidth with PCIEX16(G3)_2. The PCIEX16(G3)_2 will run x1 mode when any of the PCIEX16(G3)_1/3 and PCIEX1(G3) slots is occupied.
Storage
- Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports
- AMD Ryzen™ 9000 & 7000 Series Desktop Processors
  - M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
  - M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
- AMD Ryzen™ 8000 Series Desktop Processors
  - M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
  - M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)*
- AMD B840 Chipset
  - M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode)
  - 4 x SATA 6Gb/s ports
- Note:
  - *Specifications vary by CPU types.
- AMD RAIDXpert2 Technology
  - Ryzen™ 9000 Series Processors: RAID 0/1/5/10
  - Ryzen™ 8000 Series Processors: RAID 0/1
  - Ryzen™ 7000 Series Processors: RAID 0/1/10
Ethernet
- 1 x Realtek 2.5Gb Ethernet
- ASUS LANGuard
Wireless & Bluetooth
- Wi-Fi 6E
- 2x2 Wi-Fi 6E (802.11ax)
- Supports 2.4/5/6GHz frequency band*
- Bluetooth® v5.3
- *WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later.
- The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.
USB
- Rear USB (Total 8 ports):
  - 2 x USB 10Gbps port(s) (1 x Type-A + 1 x USB Type-C®)
  - 2 x USB 5Gbps ports (2 x Type-A)
  - 4 x USB 2.0 ports (4 x Type-A)
- Front USB (Total 7 ports):
  - 1 x USB 5Gbps connector (supports USB Type-C®)
  - 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
  - 2 x USB 2.0 headers support 4 additional USB 2.0 ports
- Note:
  - *USB Type-C® power delivery output: max. 5V/3A
Audio
- Realtek 7.1 Surround Sound High Definition Audio CODEC*
  - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
  - Supports up to 24-Bit/192 kHz playback
- Audio Features:
  - Audio Shielding
  - Premium audio capacitors
  - Dedicated audio PCB layers
- Note:
  - *A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Back Panel I/O Ports
- 1 x USB 10Gbps port (1 x USB Type-C®)
- 1 x USB 10Gbps port (1 x Type-A)
- 2 x USB 5Gbps ports (2 x Type-A)
- 4 x USB 2.0 ports (4 x Type-A)
- 1 x DisplayPort
- 1 x HDMI™ port
- 1 x Wi-Fi module
- 1 x Realtek 2.5Gb Ethernet port
- 3 x Audio jacks
- 1 x BIOS FlashBack™ button
Internal I/O Connectors
- Fan and Cooling Related:
  - 1 x 4-pin CPU Fan header
  - 1 x 4-pin CPU OPT Fan header
  - 1 x 4-pin AIO Pump header
  - 4 x 4-pin Chassis Fan header
- Power Related:
  - 1 x 24-pin Main Power connector
  - 1 x 8-pin +12V CPU Power connectors
  - 1 x 4-pin +12V CPU Power connectors
- Storage Related:
  - 3 x M.2 slots (Key M)
  - 4 x SATA 6Gb/s ports
- USB:
  - 1 x USB 5Gbps connector (supports USB Type-C®)
  - 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
  - 2 x USB 2.0 headers support 4 additional USB 2.0 ports
- Miscellaneous:
  - 3 x Addressable Gen 2 headers
  - 1 x Clear CMOS header
  - 1 x Chassis Intrusion header
  - 1 x COM Port header
  - 1 x Front Panel Audio header (F_AUDIO)
  - 1 x S/PDIF Out header
  - 1 x SPI TPM header (14-1 pin)
  - 1 x 10-1 pin System Panel header
  - 1 x Thunderbolt™ (USB4®) header
Special Features
- ASUS 5X PROTECTION III:
  - DIGI+ VRM
  - LANGuard
  - Overvoltage protection
  - SafeSlot core+
  - Stainless-steel back I/O
- ASUS Q-Design:
  - Q-Antenna
  - Q-Dashboard
  - Q-DIMM
  - Q-LED Core
  - Q-Slot
- ASUS Thermal Solution:
  - Flexible M.2 heatsink
  - VRM heatsink design
- ASUS EZ DIY:
  - BIOS FlashBack™ button
  - BIOS FlashBack™ LED
  - Pre-mounted I/O shield
  - SafeSlot core+
- Aura Sync:
  - Addressable Gen 2 headers
Software Features
- ASUS Exclusive Software:
  - Armoury Crate
    - Aura Creator
    - Aura Sync
    - Fan Xpert 2+
    - Power Saving
  - ASUS DriverHub
  - ASUS GlideX
  - TurboV Core
  - ASUS CPU-Z
  - Adobe Creative Cloud (Free Trial)
  - Norton 360 Deluxe (60 Days Free Trial)
  - WinRAR (40 Days Free Trial)
- UEFI BIOS:
  - ASUS EZ DIY:
    - ASUS CrashFree BIOS 3
    - ASUS EZ Flash 3
    - ASUS UEFI BIOS EZ Mode
    - ASUS MyHotkey
BIOS
- 256 Mb Flash ROM, UEFI AMI BIOS
Manageability
- WOL by PME, PXE
Accessories
- Cables:
  - 2 x SATA 6Gb/s cables
- Miscellaneous:
  - 1 x ASUS WiFi Q-Antenna
  - 1 x M.2 rubber packages
  - 3 x Screw packages for M.2 SSD
- Documentation:
  - 1 x Quick start guide
Operating System
- Windows® 11, Windows® 10 64-bit
Form Factor
- ATX Form Factor
- 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )