MAINBOARD (AM5) ASUS PRIME B840-PLUS WIFI-CSM DDR5

* Refer to https://www.asus.com/support/download-center/ for CPU support list.

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/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market.
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

* 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.

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.

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***

* 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)_1/3 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.

– To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

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

* 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

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

* USB Type-C® power delivery output: max. 5V/3A

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

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

UEFI BIOS
ASUS EZ DIY
– ASUS CrashFree BIOS 3
– ASUS EZ Flash 3
– ASUS UEFI BIOS EZ Mode
– ASUS MyHotkey