ASUS PRIME B860M-A WIFI-CSM Intel motherboard
- LGA 1851
- Support Intel® Core…
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ASUS
ATX board for Intel Core Ultra Series 2 with 12+2+1 80A power stages, DDR5 up to 8666 MT/s, PCIe 5.0 x16, three M.2 slots, Wi-Fi 7 and 2.5Gb LAN
Option TUF GAMING B860-PLUS WIFI
Struck-through versions exist but are not stocked here.
This ATX motherboard uses the Intel B860 chipset and an LGA 1851 socket to support Intel Core Ultra Processors (Series 2). It is aimed at builders who want a DIY-friendly platform with integrated Wi-Fi 7 and 2.5 Gb Ethernet for modern gaming or AI workloads.
The primary PCIe 5.0 x16 slot connects directly to the CPU for graphics. One M.2 slot runs at PCIe 5.0 x4, while two additional M.2 slots run at PCIe 4.0 x4 from the chipset. The chipset-linked PCIe 4.0 x16 slot shares bandwidth with the PCIe 4.0 x1 slot, so populating the x1 slot reduces the x16 slot to x2 mode.
A pre-mounted I/O shield, PCIe Slot Q-Release, M.2 Q-Latch and Q-Antenna reduce the tools needed during assembly. BIOS FlashBack allows firmware updates without a CPU installed. Builders should verify DDR5 module heights against the large VRM heatsinks and confirm that the 8+8 pin ProCool connectors match their power supply cables.
| Brand | ASUS |
|---|---|
| Model | TUF GAMING B860-PLUS WIFI |
| Part Number | 90MB1JL0-M0AAY0 |
| CPU Socket Type | LGA 1851 |
| CPU Type | Intel Core Ultra Processors (Series 2) |
| Chipset | Intel B860 |
| Number of Memory Slots | 4x288pin (DDR5) |
| Memory Standard | Up to 8666+MT/s (OC) |
| Maximum Memory Supported | 192GB |
| Channel Supported | Dual Channel |
| Memory Performance Profile | Intel XMP 3.0 |
| Memory Feature | Support up to 8666+ MT/s (OC), Non-ECC, Un-buffered ,Clocked Unbuffered DIMM (CUDIMM) Dual channel memory architecture Supports Intel Extreme Memory Profile (XMP) memory module ASUS Enhanced Memory Profile III(AEMPIII) **Non-ECC, un-buffered DDR5 memory supports On-Die ECC function |
| PCI Express 5.0 x16 | Intel Core Ultra Processors (Series 2) 1 x PCIe 5.0 x16 slot |
| PCI Express 4.0 x16 | Intel B860 Chipset 1 x PCIe 4.0 x16 slot (supports x4 mode)* |
| PCI Express x1 | 1 x PCIe 4.0 x1 slot* * PCIEX16(G4) shares bandwidth with PCIEX1(G4). When PCIEX1(G4) runs at PCIe x1 mode, PCIEX16(G4) will only run at PCIe x2 mode. |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
| M.2 | Intel Core Ultra Processors(Series 2)* M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode) Intel B860 Chipset M.2_2 slot (Key M), type 2280/22110 (supports PCIe 4.0 x4 mode) M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode) |
| SATA RAID | * Intel Rapid Storage Technology supports, SATA RAID 0/1/5/10. |
| Audio Channels | 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 - Rear optical S/PDIF out port - Premium audio capacitors - Dedicated audio PCB layers - Audio cover * Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio. |
| Max LAN Speed | 2.5Gbps |
| Wireless LAN | Wi-Fi 802.11 be |
| Bluetooth | Bluetooth 5.4 |
| Back I/O Ports | 1 x USB 20Gbps port (1 x USB Type-C with DP Alt mode) 2 x USB 10Gbps ports (2 x USB Type-A) 3 x USB 5Gbps ports (3 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x DisplayPort 1 x HDMI port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 5 x Audio jacks 1 x Optical S/PDIF out port 1 x BIOS FlashBack button |
| Onboard 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 additional USB 2.0 ports |
| Other 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 4 x 4-pin Chassis Fan headers Miscellaneous 3 x Addressable Gen 2 headers 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 10-1 pin Front System Panel header 1 x Thunderbolt (USB4) header |
| BIOS Feature | 256 Mb Flash ROM, UEFI AMI BIOS |
| Software | ASUS Exclusive Software Armoury Crate - Aura Creator - Aura Sync - Fan Xpert 4 - Power Saving ASUS DriverHub ASUS GlideX TUF GAMING CPU-Z Adobe Creative Cloud (Free Trial) DTS Audio Processing Norton 360 for Gamers (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 | Windows 11 (22H2 & later) |
| Form Factor | ATX |
| Dimensions (W x L) | 12.0" x 9.6" |
| Power Pin | 1 x 24-pin Main Power connector 2 x 8-pin +12V CPU Power connectors |
| Features | ASUS TUF PROTECTION - DIGI+ VRM (- Digital power design with DrMOS) - ESD Guards - TUF LANGuard - Overvoltage protection - SafeSlot - Stainless-steel back I/O ASUS Q-Design - M.2 Q-Latch - PCIe Slot Q-Release - Q-Antenna - Q-Dashboard - Q-DIMM - Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green]) - Q-Slot ASUS Thermal Solution - M.2 heatsink - VRM heatsink design ASUS EZ DIY - BIOS FlashBack™ button - BIOS FlashBack™ LED - CPU Socket lever protector - ProCool - Pre-mounted I/O shield - SafeDIMM Aura Sync - Addressable Gen 2 headers |
| Package Contents | Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x ASUS WiFi Q-Antenna 2 x M.2 rubber packages 1 x Screw package for M.2 SSD 1 x TUF GAMING sticker Documentation 1 x Quick start guide |
| Shipping weight | 1.91 kg |
| Package size | 356 × 279 × 76 mm |
Other versions of this model
Same family, different memory, cooler or clock — compare before you commit.
The board follows the ATX form factor and needs both an 8-pin and an additional 8-pin ProCool connector for the 12+2+1 80A DrMOS power stages.
Four 288-pin slots accept non-ECC unbuffered DDR5 up to 8666 MT/s overclocked, with a maximum of 192 GB in dual-channel mode.
Three M.2 slots are provided — one PCIe 5.0 x4 and two PCIe 4.0 x4 — each equipped with a dedicated M.2 heatsink.
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