ASUS PRIME B860M-A-CSM
ASUS PRIME B860M-A-CSM
The ASUS PRIME B860M-A-CSM motherboard supports Intel® Core™ Ultra (Series 2) processors and features an advanced 7+1+1+1 power stage system. These stages are rated for up to 80 amps, ensuring stable performance even when overclocking. The board is equipped with enhanced heatsinks, including a passive heatsink for the M.2 drive and chipset, which ensure efficient heat dissipation even under heavy loads. Thanks to its advanced DDR5 memory system and high-speed M.2 slots, including PCIe 5.0, the board is ideal for those who demand optimal performance for gaming or content creation.
Intel B860
Chipset
Intel 1851
Socket
mATX (Micro ATX)
Format
DDR5
Memory type
4×
Number of RAM slotsKey features of the ASUS PRIME B860M-A-CSM motherboard
- Support for Intel® Core™ Ultra (Series 2) processors and LGA 1851 socket
- 7+1+1+1 phase power system with MOSFETs rated up to 80A for stable performance
- ASUS Enhanced Memory Profile III (AEMP III) feature reaching up to DDR5-7600
- Two M.2 slots with PCIe 5.0 for fast data transfer and improved system performance
- Advanced cooling system with integrated heatsinks for M.2 and chipset
- USB Type-C® with speeds up to 20Gb/s for connecting peripherals
- PCIe 5.0 x16 interface ensuring maximum bandwidth and support for modern devices
Advanced power for stable performance and efficiency
The PRIME B860M-A-CSM motherboard is designed for the maximum performance of Intel® Core™ Ultra (Series 2) processors and is equipped with 7 (80A) + 1 (80A) + 1 (80A) + 1 (80A) power stages, which integrate MOSFETs and drivers rated for up to 80 amps. This design ensures stability, efficiency, and performance for current and future Intel® processors. The multi-layered PCB effectively dissipates heat, which improves system stability and gives the processor more overclocking headroom. Proprietary 8-pin connectors deliver 12V power directly to the processor, with solid pins for a higher current load. The Power Saving feature enables you to optimise power consumption through settings that limit processor power, dim Aura lighting, or switch the power plan in Windows. The Digi+ voltage-regulator module provides real-time control over voltage drop and automatically switches frequency.
Enhanced memory and storage performance
ASUS Enhanced Memory Profile III (AEMP III) is an advanced firmware feature that optimises DDR5 memory performance, achieving the best balance between performance and stability. Through two-phase tuning of the clock driver and memory frequency, AEMP III achieves top speeds of up to DDR5-7600 or higher, delivering up to 19% better performance than the base Intel DDR5 6400 band. The DIMM Fit feature, exclusive to ASUS BIOS, analyses memory modules and optimises performance, compatibility, and system stability, which is ideal for overclocking, gaming, and content creation. Two M.2 slots on the PRIME B860M-A-CSM motherboard enable high-speed data transfers of up to 128Gb/s (PCIe 5.0) and 64Gb/s (PCIe 4.0), which speeds up application loading and improves system boot times.
Cooler by design
The PRIME B860M-A-CSM motherboard is engineered to keep your build cool and stable even under heavy loads. It is equipped with integrated heatsinks, including VRM heatsinks, a passive chipset heatsink, and an M.2 heatsink, and features hybrid fan headers to ensure effective heat dissipation. Smart cooling features, including temperature sensors and a 4-pin PWM/DC fan, work with the ASUS Fan Xpert 2+ software, which offers complete control over the fans and lets you set an auto-tuning mode or an extremely quiet mode for minimal noise during light tasks. The UEFI BIOS system also enables fan control. Compatibility with ASUS AIO coolers provides robust performance for overclocking and customisable options for gaming rigs.
Enhanced connectors
The PRIME B860M-A-CSM motherboard offers extensive connectivity options, including support for the latest PCI Express 5.0 version and fast USB ports. There is a rear USB Type-C® connector with transfer speeds of up to 20Gb/s, which is ideal for demanding builds with many connected peripherals. Modern processors support the PCIe 5.0 interface, which doubles the data transfer speed compared to PCIe 4.0, improves signal integrity and ensures backward compatibility with previous PCIe versions. The PCIe 5.0 x16 slots offer a transfer bandwidth of up to 512Gb/s, which significantly increases system performance when using modern devices.
Advanced ASUS UEFI BIOS for easy system configuration and tuning
The renowned ASUS UEFI BIOS offers extensive options for configuring, modifying, and tuning your system, providing simple tools for beginners and comprehensive features for advanced users. The BIOS Q-Dashboard simplifies motherboard setup with an intuitive visual display of hardware connections and corresponding BIOS settings. The advanced UEFI mode gives you full control over your system with search and fine-tuning options. The ASUS MyHotkey feature lets you customise keys for efficient switching of functions during the POST test. EZ mode displays important settings and statistics and offers quick access to settings with a single click. The graphical fan control makes it easy to customise settings by dragging the curve, while Aura On/Off mode (Stealth) lets you easily turn Aura RGB lighting on or off for a subdued aesthetic.
ASUS DriverHub and Armoury Crate for optimal performance and customisation
ASUS DriverHub simplifies the installation and management of ASUS drivers and utilities, automatically detecting and displaying available updates to ensure your hardware is always up-to-date and performing optimally. The application lets you install and check for updates with a single click, making system maintenance easier. Armoury Crate provides centralised control for customising RGB lighting via Aura Sync for compatible devices, as well as control over ASUS products, including keyboards and mice. It also integrates product registration and a news feed for easy access to information. Aura Sync offers complete control over RGB lighting for built-in LEDs as well as external devices connected to the RGB headers on the motherboard, which can be synchronised with the growing portfolio of Aura-compatible products.
DIY friendly
The PRIME B860M-A-CSM motherboard is designed with EZ PC DIY innovations that make the computer assembly process easier and faster, making building your own PC simple and enjoyable. The pre-mounted I/O shield protects the ports, simplifies assembly, and improves the look of the build. SafeSlot, reinforced with a metal shroud, ensures secure card installation and provides higher transfer speeds thanks to its support for PCIe 5.0, which is twice as fast as PCIe 4.0. The Q-LED Core feature displays colour-coded lights during the POST test, which helps users diagnose and troubleshoot problems.
Ports
Storage
- Number of SATA III: 4
- Number of M.2 slots: 2
- M.2 slot 1: M.2 PCI-E NVMe Gen5
- M.2 slot 2: M.2 PCI-E NVMe Gen4
- Features: RAID 0, RAID 1, RAID 10, RAID 5
USB ports
- Internal USB 2.0: 4
- Internal USB 3.2 Gen 1: 4
- Internal USB-C 3.2 Gen 2x2: 1
- Rear USB 3.2 Gen 1: 2
- Rear USB 3.2 Gen 2: 1
- Rear USB-C 3.2 Gen 2x2: 1
Graphics
- HDMI 2.1
- Graphics outputs: HDMI, DisplayPort
Audio
- Number of channels: 8
- Rear connectors: 3.5mm jack, optical S/PDIF
- Internal connectors: S/PDIF
Other
- Rear: BIOS switch, CMOS reset
- Power supply: 24pin, 2× 8pin
- Cooling:
- Number of PWM FAN (4-pin): 6
- Water pump: 4-pin
- Internal: Chassis intrusion detection, RGB LED (4-pin), temperature sensors
Choosing a motherboard
When choosing a motherboard (also known as a mainboard), it's important to pay close attention to the motherboard's socket type, form factor, and chipset. These are the most crucial parameters, as they ensure the board's compatibility with the processor, expansion cards, and other components. The specific socket determines your choice of processor, while the remaining connectors dictate which other components you'll need for your future PC.Specifications
Socket and chipset
Format & functions
Memory
Advanced parameters
Connectors
Compatibility
Colour
| Code: | ACb860p4 |
| Warranty: | 36 months |
| Links: | Producer's Website: |
| Manufacturer information |
ASUSTek COMPUTER INC. 1F.,No.15, Lide Rd., Beitou Dist., Taipei City 112 Tel: +886-2-2894-3447 Tel: +886-2-2890-7798 https://gr.asus.com/ProductSafety ASUS COMPUTER GmbH Harkortstrasse 21-23 40880 Ratingen Germany, Europe Email: [email protected] ASUS COMPUTER GmbH, Harkortstrasse 21-23, 40880 Ratingen, Germany, Europe, [email protected] ASUS is a symbol of the growth of Taiwan's economy. The firm's beginnings date back to April 2, 1989, when as a small manufacturer of motherboards began his work with a few employees. Today, Asus employs more than 12,500 employees worldwide. ASUS products can be found in almost every category of the information technology marketplace. ASUS is focused on desktops, laptops, phones, optical drives and components. In the manufacture of motherboards, the company is now the dominant player with a staggering 40% market share. 
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