AMD Socket AM5, AMD B850 Chipset, 4 x DIMM slots, max. 256GB, DDR5
TUF GAMING
B850M-PLUS II
ASUS TUF GAMING B850M-PLUS II takes all the essential elements of the latest AMD Ryzen™ processors and combines them with game-ready features and proven durability. Engineered with military-grade components, an upgraded power solution and a comprehensive cooling system, this motherboard goes beyond expectations with rock-solid and stable performance for marathon gaming. TUF GAMING motherboards also undergo rigorous endurance testing to ensure that they can handle conditions where others may fail. This platform delivers the power and connectivity that advanced AI PC applications demand.
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 is an ASUS technical expert that's always available to answer your questions. Owners of compatible ASUS motherboards can interact with this AI-powered technology using natural language to learn more about their hardware. For DIY beginners, it can provide easy-to-understand explanations of one-click optimization features like AI Overclocking and fan speed tuning, and for seasoned PC-building veterans, it can offer guidance and instructions on the latest features offered by ASUS.
* Availability of ASUS AI Advisor may vary by region.
**AI Advisor functions may vary by platform.
UEFI BIOS
The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.
| Processor |
|---|
| Supported processor sockets |
Socket AM5 |
| Compatible processor series |
AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket |
Socket AM5 |
| Processor manufacturer |
AMD |
| Memory |
|---|
| Unbuffered memory |
Yes |
| Maximum internal memory |
256 GB |
| ECC сompatibility |
ECC & Non-ECC |
| Memory channels |
Dual-channel |
| Memory slots type |
DIMM |
| Number of memory slots |
4 |
| Supported memory types |
DDR5-SDRAM |
| Storage controllers |
|---|
| RAID levels |
0, 1, 5, 10 |
| RAID support |
Yes |
| Number of HDDs supported |
4 |
| Number of storage drives supported |
7 |
| Supported storage drive interfaces |
M.2, SATA III |
| Supported storage drive types |
HDD & SSD |
| Graphics |
|---|
| Parallel processing technology support |
Not supported |
| Internal I/O |
|---|
| Number of RGB LED pin headers |
3 |
| RGB LED pin header |
Yes |
| 12V power connector |
Yes |
| Number of COM connectors |
1 |
| EPS power connector (8-pin) |
Yes |
| Chassis intrusion connector |
Yes |
| Number of chassis fan connectors |
3 |
| CPU fan connector |
Yes |
| ATX Power connector (24-pin) |
Yes |
| Front panel connector |
Yes |
| Front panel audio connector |
Yes |
| Number of SATA III connectors |
4 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors |
1 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors |
1 |
| USB 2.0 connectors |
2 |
| Rear panel I/O ports |
|---|
| DisplayPorts quantity |
1 |
| HDMI ports quantity |
1 |
| Ethernet LAN (RJ-45) ports |
1 |
| USB 3.2 Gen 2x2 Type-C ports quantity |
1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity |
3 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity |
4 |
| USB 2.0 ports quantity |
4 |
| Network |
|---|
| Wi-Fi |
No |
| Ethernet interface type |
2.5 Gigabit Ethernet |
| Ethernet LAN |
Yes |
| Features |
|---|
| Windows operating systems supported |
Windows 10 x64, Windows 11 |
| Audio output channels |
7.1 channels |
| Audio chip |
Realtek ALC1220P |
| Motherboard chipset |
AMD B850 |
| Motherboard chipset family |
AMD |
| Motherboard form factor |
micro ATX |
| Component for |
PC |
| Expansion slots |
|---|
| 3rd M.2 highest PCI Express generation |
4.0 |
| 3rd M.2 largest key size |
2280 |
| 2nd M.2 highest PCI Express generation |
4.0 |
| 2nd M.2 largest key size |
2280 |
| 1st M.2 highest PCI Express generation |
5.0 |
| 1st M.2 largest key size |
2280 |
| Number of M.2 (M) slots |
3 |
| PCI Express x16 (Gen 5.x) slots |
1 |
| PCI Express x16 (Gen 4.x) slots |
1 |
| PCI Express x1 (Gen 4.x) slots |
1 |
| BIOS |
|---|
| BIOS memory size |
256 Mbit |
| BIOS type |
UEFI AMI |
| Packaging data |
|---|
| Package weight |
1.65 kg |
| Package height |
67.5 mm |
| Package depth |
275 mm |
| Package width |
275 mm |
| Weight & dimensions |
|---|
| Depth |
244 mm |
| Width |
244 mm |
| Packaging content |
|---|
| Screws included |
Yes |
| Cables included |
SATA |
