MotherboardsAsus
ASUS PRIME B860M-A-CSM
Quick Specs
ChipsetIntel | ® | B860 Chipset
SocketLGA 1851
MemoryDDR5
Form FactormATX
M.2 Slots3
Model: 30885
About this motherboards
PRIME B860M-A-CSM, engineered for Intel® Core™ Ultra Processors (Series 2), features AI capabilities, DDR5, PCIe 5.0, and ultrafast USB for top performance.
Technical Specifications23 specs
General
Model
PRIME B860M-A-CSM
News Updates
- Please see the updated OS support requirements for the Intel
- ®
- Core Ultra 200S series below:
- •Intel
- ®
- Core Ultra 200S Series:
- Supports Windows 10 (version 21H2 and later) and Windows 11 (version 22H2 and later).
- •Intel
- ®
- Core Ultra 200S Plus Series:
- Windows 11 (version 25H2 and later) for full compatibility.
- Please visit our
- GLOBAL website
- to check and download the latest updates.
Cpu
- Support Intel
- ®
- Core™ Ultra Processors (Series 2) , LGA1851
- Supports Intel
- ®
- Turbo Boost Technology 2.0 and Intel
- ®
- Turbo Boost Max Technology 3.0
- *Refer to
- https://www.asus.com/support/download-center/
- for CPU support list.
- **Intel
- ®
- Turbo Boost Max Technology 3.0 support depends on the CPU types.
Chipset
- Intel
- ®
- B860 Chipset
Memory
- 4 x DIMM slots, max. 256GB, DDR5
- Supports up to 8666+MT/s (OC), Non-ECC,Un-buffered ,Clocked Unbuffered DIMM (CUDIMM)
- Dual channel memory architecture
- DIMM Fit
- Supports Intel
- ®
- Extreme Memory Profile (XMP) memory module
- ASUS Enhanced Memory Profile III(AEMPIII)
- *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
- 2 x DisplayPort
- 1 x HDMI™ port
- 1 x USB 20Gbps port (USB Type-C
- ®
- ) supports DisplayPort video output
- * Graphics specifications may vary between CPU types. Please refer to
- www.intel.com
- for any updates.
- ** Supports max. 4K@60Hz as specified in DisplayPort 1.4.
- *** Supports 4K@60Hz as specified in HDMI 2.1.
- **** Supports max. 4K@120Hz as specified in DisplayPort 1.4.
- ***** VGA resolution support depends on processors' or graphic cards' resolution.
- ******While installing the operating system, please ensure that your monitor is connected to the HDMI port on the back I/O panel or to a discrete graphics card.
Expansion Slots
- Intel
- ®
- Core™ Ultra Processors(series 2)
- 1 x PCIe 5.0 x16 slot
- Intel
- ®
- B860 Chipset
- 1 x PCIe 4.0 x16 slot (supports x4 mode)
- 1 x PCIe 4.0 x1 slot
- - To ensure compatibility of the device installed, please refer to
- https://www.asus.com/support/download-center/
- for the list of supported peripherals.
Storage
- Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports
- Intel
- ®
- Core™ Ultra Processors (Series 2)
- M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
- Intel
- ®
- B860 Chipset
- M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 modes)
- 4 x SATA 6Gb/s ports
- * Intel
- ®
- Rapid Storage Technology supports SATA RAID 0/1/5/10.
Ethernet
- 1 x Realtek 2.5Gb Ethernet
- ASUS LANGuard
Usb
- Rear USB (Total 8 ports)
- 1 x USB 20Gbps port (1 x USB Type-C
- ®
- with DP Alt mode)
- 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)
- Front USB (Total 5 ports)
- 1 x USB 10Gbps connector (supports USB Type-C
- ®
- )
- 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
- 1 x USB 2.0 header supports 2 additional USB 2.0 ports
- *USB Type-C
- ®
- power delivery output: max. 5V/3A
- **USB_E1 port, USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.
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
- * 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 20Gbps port (1 x USB Type-C
- ®
- with DP Alt mode)
- 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 )
- 2 x DisplayPort
- 1 x HDMI™ port
- 1 x Realtek 2.5Gb Ethernet port
- 3 x Audio jacks
Internal I O
- 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
- 3 x 4-pin Chassis Fan headers
- Power Related
- 1 x 24-pin Main Power connector
- 1 x 8-pin +12V CPU Power connector
- Storage Related
- 2 x M.2 slots (Key M)
- 4 x SATA 6Gb/s ports
- USB
- 1 x USB 10Gbps connector (supports USB Type-C
- ®
- )
- 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
- 1 x USB 2.0 header supports 2 additionalUSB 2.0 ports
- Miscellaneous
- 3 x Addressable Gen 2 headers
- 1 x Aura RGB header
- 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 Front System Panel header
- 1 x Thunderbolt™ (USB4
- ®
- ) header
Special Features
- ASUS 5X PROTECTION III
- - DIGI+ VRM (- Digital power design with DrMOS)
- - ESD Guards
- - LANGuard
- - Overvoltage protection
- - SafeSlot
- - Stainless-steel back I/O
- ASUS Q-Design
- - Q-Dashboard
- - Q-DIMM
- - Q-LED Core
- - Q-Slot
- ASUS Thermal Solution
- - M.2 heatsink
- - VRM heatsink design
- ASUS EZ DIY
- - ProCool
- - Pre-mounted I/O shield
- Aura Sync
- - Aura RGB header
- - Addressable Gen2 headers
Software Features
- ASUS Exclusive Software
- Armoury Crate
- - Aura Creator
- - Aura Sync
- - Fan Xpert 2+
- - Power Saving
- ASUS DriverHub
- ASUS CPU-Z
- Norton 360 for Deluxe (60 Days Free Trial)
- WinRAR (40 Days Free Trial)
- UEFI BIOS
- ASUS EZ DIY
- - ASUS CrashFree BIOS 3
- - ASUS EZ Flash
- - ASUS UEFI BIOS EZ Mode
- - ASUS MyHotkey
Bios
256 (128+128) Mb Flash ROM, UEFI AMI BIOS
Manageability
WOL by PME, PXE
Accessories
- Cables
- 2 x SATA 6Gb/s cables
- Miscellaneous
- 1 x M.2 rubber package
- 1 x Screw package for M.2 SSD
- Documentation
- 1 x ACC Express Activation Key Card
- 1 x Quick start guide
Operating System
Windows 11 (22H2 & later), Windows 10 64-bit(21H2 & later)
Form Factor
- micro-ATX Form Factor
- 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)
Physical Dimensions
Length Mm
243.8
Width Mm
243.8
Height Mm
619.8
