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ASUS PRIME B860M-A-CSM vs ASUS Pro B860M-C-CSM

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

ASUS PRIME B860M-A-CSM

UK manufacturer specification · PRIME B860M-A-CSM

Full product profile Official image

Exact model & source notes

PRIME B860M-A-CSM motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHAT DIFFERS

7 verified differences, led by Memory type, slots and limit, network interfaces and requirements and audio interfaces. Compared in full below. Not a rating.

See the 7 verified differences

THE CONTENDER

ASUS Pro B860M-C-CSM

UK manufacturer specification · Pro B860M-C-CSM

Full product profile Official image

Exact model & source notes

Pro B860M-C-CSM motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

PRIME B860M-A-CSM UK & US retailers

UK & US price history: no verified listing yet

Pro B860M-C-CSM UK & US retailers

UK & US price history: no verified listing yet

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THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

SPECIFICATIONS SIDE BY SIDE7 topics

SELECTED TOPIC

01 / 07

Memory type, slots and limit

Check the exact configuration and source conditions for your use.

ASUS PRIME B860M-A-CSM4 x DIMM slots, max. 256GB, DDR5 Supports 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(AEMPIII) *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.

Manufacturer specification

Source 1

ASUS Pro B860M-C-CSM4 x DIMM slots, max. 256GB, DDR5, dual DIMM clips Supports 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/. * *Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Manufacturer specification

Source 1

Explore the full specifications

Plan the complete platform. Check the exact CPU-support list, required BIOS and memory validation before buying. PCIe generations and lane allocations can change with the processor. A socket match or slot count is not a guarantee that every component works together at its highest advertised setting.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

7 verified differences, most decision-relevant first. All are also drawn in Visual facts above. Missing information stays separate.

Memory type, slots and limit

In Visual facts

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Network interfaces and requirements

In Visual facts

ASUS PRIME B860M-A-CSM1 x Realtek 2.5Gb Ethernet ASUS LANGuard

ASUS Pro B860M-C-CSM1 x Intel®1Gb ASUS LANGuard *With Intel® I219-V LAN, Wake-on-LAN is not supported in S5 after the system transitions from G3.; M.2 slot only 2230 (Key E, CNVi & PCIe)* *Wi-Fi module is sold separately.

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Audio interfaces

In Visual facts

ASUS PRIME B860M-A-CSMRealtek 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.

ASUS Pro B860M-C-CSMRealtek 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 * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Expansion slots and restrictions

In Visual facts

ASUS PRIME B860M-A-CSMIntel® 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) 1 x PCIe 4.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

ASUS Pro B860M-C-CSMIntel® Core™ Ultra Processors(series 2)* 1 x PCIe 5.0 x16 SafeSlot Intel® B860 Chipset 1 x PCIe 4.0 x16 slot (supports x4 mode) 1 x PCIe 4.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Internal headers and connectors

In Visual facts

ASUS PRIME B860M-A-CSMFan 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 3 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 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports 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 additionalUSB 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 (14-1 pin) 1 x 10-1 pin Front System Panel header 1 x Thunderbolt™ (USB4®) header

ASUS Pro B860M-C-CSMFan and Cooling Related 1 x 4-pin CPU Fan header 2 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 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 10Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 1 x Clear CMOS header 1 x Chassis Intrude header 2 x COM Port headers 1 x Front Panel Audio header (AAFP) 1 x COM debug header 1 x LPT header 1 x Mono-Out Audio header (with Amp IC) 1 x M.2 slot (Key E) 1 x Speaker header 1x SMBUS header 1 x 10-1 pin Front Panel System header 1x SPI TPM header(14-1 pin)

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Rear-panel ports

In Visual facts

ASUS PRIME B860M-A-CSM1 x USB 20Gbps port (1 x USB Type-C® with DP Alt mode) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A ) 2 x DisplayPort 1 x HDMI™ port 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks

ASUS Pro B860M-C-CSM1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 2.0 ports (2 x Type-A ) 2 x DisplayPort 1 x HDMI™ port 1 x PS/2 keyboard (purple) port 1 x PS/2 mouse (green) port 1 x Intel® 1Gb Ethernet 3 x Audio jacks

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Show 1 more verified difference

USB ports and headers

In Visual facts

ASUS PRIME B860M-A-CSMRear USB (Total 8 ports) 1 x USB 20Gbps port (1 x USB Type-C® with DP Alt mode) 1 x USB 10Gbps port (1 x Type-A ) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A)** Front USB (Total 5 ports) 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 *USB Type-C® power delivery output: max. 5V/3A **USB_E1 port, USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.

ASUS Pro B860M-C-CSMRear USB (Total 4 ports) 1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A ) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 7 ports) 1 x USB 10Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification

ASUS Pro B860M-C-CSM — official UK technical specifications

Check the exact configuration and source conditions for your use.

Configuration & compatibility details (1)

CPU support and BIOS requirements

ASUS PRIME B860M-A-CSMSupport 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. BIOS: 256 (128+128) Mb Flash ROM, UEFI AMI BIOS

ASUS Pro B860M-C-CSMSupports 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. BIOS: 256 (128+128) Mb Flash ROM, UEFI AMI BIOS

Sources

ASUS PRIME B860M-A-CSM

Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor.

ASUS PRIME B860M-A-CSM — official UK technical specifications

ASUS Pro B860M-C-CSM

Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor.

ASUS Pro B860M-C-CSM — official UK technical specifications

These descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.

5 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS PRIME B860M-A-CSM

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

ASUS Pro B860M-C-CSM

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

13 of 13 specifications Sources in each row

Source-backed specifications for ASUS PRIME B860M-A-CSM and ASUS Pro B860M-C-CSM
Specification	ASUS PRIME B860M-A-CSM	ASUS Pro B860M-C-CSM

CPU socket Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	LGA1851	LGA1851
Chipset Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	Intel® B860 Chipset	Intel® B860 Chipset
Form factor and dimensions Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)	micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)
CPU support and BIOS requirementsDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor. ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor. ASUS Pro B860M-C-CSM — official UK technical specifications	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. BIOS: 256 (128+128) Mb Flash ROM, UEFI AMI BIOS	Supports 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. BIOS: 256 (128+128) Mb Flash ROM, UEFI AMI BIOS
Listed operating systems Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	Windows 11 (22H2 & later), Windows 10 64-bit(21H2 & later)	Windows 11 (22H2 & later), Windows 10 64-bit (21H2 & later)

Memory type, slots and limitDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	4 x DIMM slots, max. 256GB, DDR5 Supports 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(AEMPIII) 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.	4 x DIMM slots, max. 256GB, DDR5, dual DIMM clips Supports 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/. * *Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Storage interfaces and restrictions Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	Total supports 2 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 (supports PCIe 4.0 x4 modes) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.	Total supports 2 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 (supports PCIe 4.0 x4 modes) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.

Expansion slots and restrictionsDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	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) 1 x PCIe 4.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.	Intel® Core™ Ultra Processors(series 2)* 1 x PCIe 5.0 x16 SafeSlot Intel® B860 Chipset 1 x PCIe 4.0 x16 slot (supports x4 mode) 1 x PCIe 4.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

USB ports and headersDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	Rear USB (Total 8 ports) 1 x USB 20Gbps port (1 x USB Type-C® with DP Alt mode) 1 x USB 10Gbps port (1 x Type-A ) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A)** Front USB (Total 5 ports) 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 USB Type-C® power delivery output: max. 5V/3A *USB_E1 port, USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.	Rear USB (Total 4 ports) 1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A ) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 7 ports) 1 x USB 10Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports
Rear-panel portsDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	1 x USB 20Gbps port (1 x USB Type-C® with DP Alt mode) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A ) 2 x DisplayPort 1 x HDMI™ port 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks	1 x USB 10Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 2.0 ports (2 x Type-A ) 2 x DisplayPort 1 x HDMI™ port 1 x PS/2 keyboard (purple) port 1 x PS/2 mouse (green) port 1 x Intel® 1Gb Ethernet 3 x Audio jacks
Audio interfacesDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	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.	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 * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Network interfaces and requirementsDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	1 x Realtek 2.5Gb Ethernet ASUS LANGuard	1 x Intel®1Gb ASUS LANGuard With Intel® I219-V LAN, Wake-on-LAN is not supported in S5 after the system transitions from G3.; M.2 slot only 2230 (Key E, CNVi & PCIe) *Wi-Fi module is sold separately.

Internal headers and connectorsDifferent Sources ASUS PRIME B860M-A-CSM Manufacturer specification ASUS PRIME B860M-A-CSM — official UK technical specifications ASUS Pro B860M-C-CSM Manufacturer specification ASUS Pro B860M-C-CSM — official UK technical specifications	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 3 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 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports 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 additionalUSB 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 (14-1 pin) 1 x 10-1 pin Front System Panel header 1 x Thunderbolt™ (USB4®) header	Fan and Cooling Related 1 x 4-pin CPU Fan header 2 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 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 10Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 1 x Clear CMOS header 1 x Chassis Intrude header 2 x COM Port headers 1 x Front Panel Audio header (AAFP) 1 x COM debug header 1 x LPT header 1 x Mono-Out Audio header (with Amp IC) 1 x M.2 slot (Key E) 1 x Speaker header 1x SMBUS header 1 x 10-1 pin Front Panel System header 1x SPI TPM header(14-1 pin)

First product manufacturer source Second product manufacturer source

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ASUS Pro B860M-CT-CSM

CPU socket: LGA1851
Chipset: Intel® B860 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

ASUS PRIME B860M-A WIFI-CSM

CPU socket: LGA1851
Chipset: Intel® B860 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

ASUS B860M MAX GAMING AX

CPU socket: LGA1851
Chipset: Intel® B860 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Prices & product profile

ASUS PRIME B860M-K-CSM

CPU socket: LGA1851
Chipset: Intel® B860 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 8.75 inch (24.4cm x 22.2cm)

Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.