Asus Prime B850-Plus WiFi-CSM AM5 ATX Motherboard

CPU

AMD Socket AM5 for AMD Ryzen ™ 9000 & 8000 & 7000 Series Desktop Processors*

* Refer to https://www.asus.com/support/downloadcenter/ for CPU support list.

Chipset

AMD B850 Chipset

Memory

4 x DIMM slots, max. 256GB, DDR5 Supports up to 8000+MT/s (OC) with Ryzen ™ 9000 & 8000 & 7000 Series Processors, ECC and NonECC Unbuffered DIMM*

Dual channel memory architecture

Supports AMD Extended Profiles for Overclocking (EXPO ™)

ASUS Enhanced Memory Profile (AEMP)

* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/downloadcenter/. Adjustments will be made based on the specifications of massproduced memory products available on the market.

* NonECC, unbuffered DDR5 memory supports OnDie 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 5.0 x16 slot (supports x16 mode)

AMD Ryzen ™ 8000 Series Desktop Processors

1 x PCIe 4.0 x16 slot (supports x8/x4 mode)**

AMD B850 Chipset

1 x PCIe 4.0 x16 slot (support x4 mode)

2 x PCIe 3.0 x16 slots (support x1 mode)***

* Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).

** Specifications vary by CPU types.

*** The PCIEX16(G3)_1/2 share bandwidth with SATA6G_1/2. The SATA6G_1/2 will be disabled when The PCIEX16(G3)_1 or PCIEX16(G3)_2 runs.

To ensure compatibility of the device installed, please refer to https://www.asus.com/support/downloadcenter/ for the list of supported

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 5.0 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 B850 Chipset

M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x2 mode)

4 x SATA 6Gb/s ports

* 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

"WiFi 6E

2x2 WiFi 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 WiFi module manufacturer's website for the latest specifications."

USB

Rear USB (Total 8 ports)

4 x USB 10Gbps port(s) (3 x TypeA + 1 x USB TypeC ®)

2 x USB 5Gbps ports (2 x TypeA)

2 x USB 2.0 ports (2 x TypeA)

Front USB (Total 9 ports)

1 x USB 5Gbps connector (supports USB TypeC ®)

1 x USB 5Gbps header supports 2 additional USB 5Gbps ports

3 x USB 2.0 headers support 6 additional USB 2.0 ports

* USB TypeC ® power delivery output: max. 5V/3A

Audio

Realtek 7.1 Surround Sound High Definition Audio CODEC*

Supports: Jackdetection, Multistreaming, Front Panel Jackretasking

Supports up to 24Bit/192 kHz playback

Audio Features

Audio Shielding

Premium audio capacitors

Dedicated audio PCB layers

* 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 TypeC ®)

3 x USB 10Gbps ports (3 x TypeA)

2 x USB 5Gbps ports (2 x TypeA)

2 x USB 2.0 ports (2 x TypeA)

1 x DisplayPort

1 x HDMI ™ port

1 x WiFi 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 4pin CPU Fan header

1 x 4pin CPU OPT Fan header

1 x 4pin AIO Pump header

4 x 4pin Chassis Fan headers

Power Related

1 x 24pin Main Power connector

1 x 8pin +12V CPU Power connectors

1 x 4pin +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 TypeC ® )

1 x USB 5Gbps header supports 2 additional USB 5Gbps ports

3 x USB 2.0 headers support 6 additional USB 2.0 ports

Miscellaneous

3 x Addressable RGB 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 (141 pin)

1 x 101 pin System Panel header

1 x Thunderbolt ™ (USB4 ®) header

Special Features

ASUS 5X PROTECTION III

DIGI+ VRM

LANGuard

Overvoltage protection

SafeSlot

Stainlesssteel back I/O

ASUS QDesign

QAntenna

QDashboard

QDIMM

QLED Core

QSlot

ASUS Thermal Solution

Flexible M.2 heatsink

VRM heatsink design

ASUS EZ DIY

BIOS FlashBack ™ button

BIOS FlashBack ™ LED

Premounted I/O shield

SafeSlot

Aura Sync

Addressable RGB Gen 2 headers

Software Features

ASUS Exclusive Software

Armoury Crate

Aura Creator

Aura Sync

Fan Xpert 2+

Power Saving

ASUS AI Advisor

ASUS Driver Hub

ASUS GlideX

TurboV Core

ASUS CPUZ

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

Remote Management Features

IT Management software supported

ASUS Control Center Express(ACCE)

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 QAntenna

1 x M.2 rubber packages

3 x Screw packages for M.2 SSD

Documentation

1 x ACC Express Activation Key Card

1 x Quick start guide

Operating System

Windows ® 11, Windows ® 10 64bit

Form Factor

ATX Form Factor

12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )