PRIME B860M-K-CSM (DDR5)

Supports 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.

1851

Intel B860 

2 x DIMM slots, max. 128GB, DDR5
Supports up to 8800+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.

8800

1 x DisplayPort**
1 x HDMI™ port***  

* 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.
**** VGA resolution support depends on processors' or graphic cards' resolution.

N/A

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.

Intel® Core™ Ultra Processors (Series 2)
1 x PCIe 4.0 x16 slot

Intel® B860 Chipset
2 x PCIe 4.0 x1 slots

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

PCIe 4.0

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 mode)

4 x SATA 6Gb/s ports

* Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.

NVMe

2

Rear USB (Total 6 ports)
1 x USB 10Gbps port (1 x Type-A)
2 x USB 5Gbps ports (2 x Type-A)
3 x USB 2.0 ports (3 x Type-A)**

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.
** USB_E1 port, USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.

Fan and Cooling Related
1 x 4-pin CPU Fan header
2 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 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
2 x Addressable Gen2 headers
1 x Aura RGB header
1 x Clear CMOS 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 Panel System header

1 x USB 10Gbps port (1 x Type-A)
2 x USB 5Gbps ports (2 x Type-A)
3 x USB 2.0 ports (3 x Type-A)
1 x DisplayPort
1 x HDMITM port
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x PS/2 Keyboard/Mouse combo port

1 x Realtek 2.5Gb Ethernet
ASUS LANGuard

None

Micro ATX

N/A

256(128+128) Mb Flash ROM, UEFI AMI BIOS

ASUS 5X PROTECTION III
- DIGI+VRM
- LANGuard
- Overvoltage protection
- SafeSlot Core+
- Stainless-steel back I/O

ASUS Q-Design
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot

ASUS Thermal Solution
- VRM heatsink design

ASUS EZ DIY
- ProCool

Aura Sync
- Aura RGB header
- Addressable Gen2 headers

ASUS Exclusive Software
Armoury Crate
- Aura Sync
- Fan Xpert 2+
- Power Saving
ASUS AI Advisor
ASUS DriverHub
ASUS CPU-Z
Norton 360 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

Windows 11(22H2 & later), Windows 10 64-bit(21H2 & later)

2 x SATA 6Gb/s cables
1 x I/O Shield
1 x M.2 anchor package
1 x Quick start guide
1 x ACC Express activation key card