The ASUS PRIME B860M-A-CSM is a Micro-ATX motherboard designed for Intel processors, specifically supporting the Intel Core Ultra Series 1 and Series 2 generations via Socket 1851. Built around the Intel B860 chipset, this board measures 244 x 244 mm and features a sleek grey and black finish. It is a solid foundation for building a modern desktop PC, offering a well-balanced combination of performance-oriented features and reliable connectivity in a compact form factor.
Memory and Storage Performance
The ASUS PRIME B860M-A-CSM supports DDR5 memory across four DIMM slots in a dual-channel configuration, with a maximum capacity of 256 GB and overclocked speeds reaching up to 8666 MHz. For storage, the board includes two M.2 slots and four SATA III connectors, providing ample options for fast NVMe drives alongside traditional storage solutions. Expansion is further supported by one PCIe x16 Gen 5 slot and one PCIe x16 Gen 4 slot for additional components.
Connectivity and Audio
On the connectivity front, the board is equipped with a Realtek 2.5GbE LAN controller for fast and stable wired networking. Display output options include two DisplayPort connections and one HDMI port. USB connectivity covers multiple standards, including USB 3.2 Gen 2 Type-A and Type-C ports, alongside a Thunderbolt header. Audio is handled by a Realtek 7.1 Surround Sound HD Audio CODEC, delivering rich multi-channel sound. Additional headers include S/PDIF output, a TPM connector, and three chassis fan connectors for thorough system management.
Product number manufacturer:
90MB1K00-M0EAYC
Audio
Realtek 7.1 Surround Sound HD Audio CODEC
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
3
USB 3.2 (Gen 2) type A ports:
1
USB 3.2 (Gen 2) type C ports:
1
Internal I/O
ATX Power connector (24-pin):
Chassis fan connector(s):
3
Chassis intrusion connector:
EPS power connector (8-pin):
Front panel audio connector:
Thunderbolt header (5-pin):
1
USB 3.1 (3.1 Gen 2) connectors:
1
USB 3.1 (Gen 1) header(s):
1
Memory
Supported memory clock speeds (OC):
8666 (OC) MHz
Networking
Network technology (wired):
Physical characteristics
Processor
Compatible processor series:
Intel Core Ultra Series 1, Intel Core Ultra Series 2
Sockets
Technical details
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