Asus PRIME B860-PLUS-CSM

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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.

Intel^® B860 Chipset

4 x DIMM slots, max. 256GB, DDR5
Support 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 (AEMP III)
* 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.

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.

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

Total supports 3 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 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
M.2_3 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.

1 x Realtek 2.5Gb Ethernet
ASUS LANGuard

M.2 slot only (Key E, CNVi & PCIe)*
* Wi-Fi module is sold separately.

Rear USB (Total 6 ports)
1 x USB 20Gbps port (1 x USB Type-C®)
2 x USB 10Gbps ports (2 x Type-A)
1 x USB 5Gbps port (1 x Type-A)
2x USB 2.0 ports (2 x Type-A)
Front USB (Total 7 ports)
1 x USB 5Gbps port (1 x USB Type-C®)
1 x USB 5Gbps header supports additional 2 USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports

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.

1 x USB 20Gbps port (1 x USB Type-C®)
2 x USB 10Gbps ports (2 x Type-A)
1 x USB 5Gbps port (1 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI™ port
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks

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
4 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
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 header support 4 additional USB 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 (14-1pin)
1 x 10-1 pin Front System Panel header
1 x Thunderbolt™ (USB4®) header

ASUS 5X PROTECTION III
-DIGI+ VRM (- Digital power design with DrMOS)
- LANGuard
- Overvoltage Protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- Flexible M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- ProCool
- Pre-mounted I/O shield
Aura Sync
- Aura RGB header
- Addressable Gen 2 headers

ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 2+
- Power Saving
ASUS AI Advisor
ASUS DriverHub
ASUS CPU-Z
Adobe Creative Cloud (Free Trial)
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

2 x 128 Mb Flash ROM, UEFI AMI BIOS

WOL by PME, PXE

Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
1 x Screw package for M.2 Key E
Documentation
1 x Quick start guide
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
1 x Screw package for M.2 Key E
Documentation
1 x ACC Express Activation Key Card
1 x Quick start guide

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

ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )