ASUS PRIME B860M-A-CSM

Model
PRIME B860M-A-CSM

CPU
Support Intel® Core™ Ultra Processors (Series 2) , LGA1851

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)

Graphics
2 x DisplayPort
1 x HDMI™ port

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

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

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®)
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

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®)
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 Connectors
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

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)