B840M
AYW GAMING WIFI
8+2+1
AEMP
2.5Gb Ethernet
WiFi 6
USB 10Gbps Type-A
PCIe 4.0 slots
USB 5Gbps Type-C®
EZ PC DIY
Aura Sync
DDR5 support
Dual channel
AEMP
DDR5 support
Dual channel
AEMP
Performance
AI Solutions
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.1
Performance
Digital Power Design
Enhanced Memory & Storage Performance
Enhanced DDR5 performance
Dual M.2 slots (up to 64Gbps)
Cooling
Cooler by design
VRM heatsink and thermal pad
The massive VRM heatsink and essential thermal pad improve heat transfer from the MOSFETs and chokes for better cooling performance.
4-Pin PWM/DC fan
Each onboard header supports auto-detection of PWM or DC fans.
Multiple temperature sources
Each header can dynamically reference three thermal sensors. Fan Xpert 2+ lets you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.
M.2 heatsink
The M.2 heatsink takes care of the M.2 slot, preventing throttling that can occur with M.2 storage during extended transfers.
Passive chipset heatsink
An aluminum passive chipset heatsink ensures optimal cooling and stable performance. It is more durable and longer-lasting than heatsinks with fans, which can be vulnerable to the buildup of dust and debris.
Smart protection
A dedicated integrated circuit protects each fan header from overheating and excess current.
Smart Cooling precision
ASUS Fan Xpert 2+
Flexibility
Empowering connections
WiFi 6
2.5Gb Ethernet
USB 10Gbps Type-A
PCIe 4.0 M.2
PCIe 4.0 slot
USB 5Gbps
WiFi 6
High Speed Transferring
Realtek® 2.5Gb Ethernet
Customization
Personalization
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 RGB Gen 2 headers
Three Addressable RGB Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.
Customization
DIY friendly
M.2 Q-Latch
The innovative ASUS Q-Latch makes it easy to install or remove an M.2 SSD without the need for specific tools or screws. This design employs a simple locking mechanism to secure the drive and neatly detach it with one tap.
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.
Q-LED
The on-board Q-LED troubleshooting lights give PC builders a quick indicator to confirm that key components - CPU, RAM, graphics card, storage devices - are functioning normally during startup.
AI Advisor functions may vary by platform. ↑