The ASUS PRIME B860M-A WIFI is a Micro-ATX motherboard designed for Intel Core Ultra Series 1 and Series 2 processors, fitting Socket 1851. Built around the Intel B860 chipset, this board measures 244 x 244 mm and comes in a sleek grey and black design. It supports up to 256 GB of DDR5 memory across four DIMM slots in dual-channel configuration, with overclocked speeds reaching up to 8666 MHz. With four SATA III connectors and a UEFI AMI BIOS with 256 Mbit storage, it provides a solid foundation for a wide range of desktop builds.
Connectivity and Expansion
The ASUS PRIME B860M-A WIFI offers extensive connectivity options. It features two M.2 slots, with the first supporting PCIe 5.0 and the second PCIe 4.0, both accommodating up to 2280 form factor drives. A single PCIe 5.0 x16 slot handles discrete graphics. For external connections, the board provides two DisplayPorts and one HDMI port. USB options include four USB 3.2 Gen 1 Type-A ports, one USB 3.2 Gen 2 Type-A, one USB 3.2 Gen 2 Type-C, and a Thunderbolt header. Wired networking is handled by a Realtek 2.5GbE LAN chip.
Wireless and Audio Capabilities
Wireless performance is covered by Wi-Fi 6E (802.11ax) and Bluetooth 5.3, keeping the system ready for fast and reliable wireless communication. Audio is powered by a Realtek 7.1 Surround Sound HD Audio CODEC, delivering rich multi-channel sound output along with S/PDIF output support. A front panel audio connector is also included for convenient headset access.
Product number manufacturer:
90MB1JY0-M0EAY0
Audio
Realtek 7.1 Surround Sound HD Audio CODEC
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
4
USB 3.2 (Gen 2) type A ports:
1
USB 3.2 (Gen 2) type C ports:
1
Internal I/O
1st M.2 maximum slot size:
2280
1st M.2 slot PCI Express generation:
5.0
2nd M.2 maximum slot size:
2280
2nd M.2 slot PCI Express generation:
4.0
ATX Power connector (24-pin):
Chassis fan connector(s):
3
Chassis intrusion connector:
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):
Packaging content
Physical characteristics
Processor
Compatible processor series:
Intel Core Ultra Series 1, Intel Core Ultra Series 2
Sockets
Technical details
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