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ASUS B860M-E vs ASUS PRIME B860M-K-CSM

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

Compared products

YOUR FIRST CHOICE

ASUS B860M-E

Global manufacturer specification · B860M-E

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Exact model & source notes

B860M-E motherboard, identified in the ASUS Global catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

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Manufacturer specifications

WHAT DIFFERS

5 verified differences, led by Storage interfaces and restrictions, network interfaces and requirements and internal headers and connectors. Compared in full below. Not a rating.

See the 5 verified differences

THE CONTENDER

ASUS PRIME B860M-K-CSM

UK manufacturer specification · PRIME B860M-K-CSM

Full product profile Official image

Exact model & source notes

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

Specifications checked 17 Oct 2026.

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Manufacturer specifications

B860M-E UK & US retailers

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PRIME B860M-K-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 SIDE5 topics

SELECTED TOPIC

01 / 05

Storage interfaces and restrictions

Check the exact configuration and source conditions for your use.

ASUS B860M-ETotal supports 1 x M.2 slot and 4 x SATA 6Gb/s ports* Intel® Core™ Ultra Processors (Series 2) M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.

Manufacturer specification

Source 1

ASUS PRIME B860M-K-CSMTotal 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 mode) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.

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 ↓

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

Storage interfaces and restrictions

In Visual facts

Sources

ASUS B860M-E

Manufacturer specification

ASUS B860M-E — official Global technical specifications

ASUS PRIME B860M-K-CSM

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

Network interfaces and requirements

In Visual facts

ASUS B860M-E1 x Realtek 2.5Gb Ethernet ASUS LANGuard; M.2 slot only (Key E, CNVi & PCIe)* * Wi-Fi module is sold separately.

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

Sources

ASUS B860M-E

Manufacturer specification

ASUS B860M-E — official Global technical specifications

ASUS PRIME B860M-K-CSM

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

Internal headers and connectors

In Visual facts

ASUS B860M-EFan 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 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps 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 Front Panel Audio header (F_AUDIO) 1 x M.2 slot (Key E) 1 x S/PDIF Out header 1 x 10-1 pin Front Panel System header

ASUS PRIME B860M-K-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 5Gbps 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 2 x Addressable Gen2 headers 1 x Aura RGB header 1 x Clear CMOS 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 Panel System header

Sources

ASUS B860M-E

Manufacturer specification

ASUS B860M-E — official Global technical specifications

ASUS PRIME B860M-K-CSM

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

Rear-panel ports

In Visual facts

ASUS B860M-E1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) 1 x HDMI™ port 1 x Realtek 2.5Gb Ethernet 3 x Audio jacks

ASUS PRIME B860M-K-CSM1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) 1 x DisplayPort 1 x HDMITM port 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port

Sources

ASUS B860M-E

Manufacturer specification

ASUS B860M-E — official Global technical specifications

ASUS PRIME B860M-K-CSM

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

USB ports and headers

In Visual facts

ASUS B860M-ERear USB (Total 6 ports) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) Front USB (Total 7 ports) 1 x USB 5Gbps 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 * USB Type-C® power delivery output: max. 5V/3A ** USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.

ASUS PRIME B860M-K-CSMRear USB (Total 6 ports) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A)** Front USB (Total 7 ports) 1 x USB 5Gbps 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** * 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.

Sources

ASUS B860M-E

Manufacturer specification

ASUS B860M-E — official Global technical specifications

ASUS PRIME B860M-K-CSM

Manufacturer specification

ASUS PRIME B860M-K-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 B860M-ESupport 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 PRIME B860M-K-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 B860M-E

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 B860M-E — official Global technical specifications

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

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

7 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS B860M-E

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 PRIME B860M-K-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 B860M-E and ASUS PRIME B860M-K-CSM
Specification	ASUS B860M-E	ASUS PRIME B860M-K-CSM

CPU socket Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	LGA1851	LGA1851
Chipset Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	Intel® B860 Chipset	Intel® B860 Chipset
Form factor and dimensions Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	micro-ATX Form Factor 9.6 inch x 8.75 inch ( 24.4 cm x 22.2 cm )	micro-ATX Form Factor 9.6 inch x 8.75 inch (24.4cm x 22.2cm)
CPU support and BIOS requirementsDifferent Sources ASUS B860M-E 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 B860M-E — official Global technical specifications ASUS PRIME B860M-K-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-K-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 B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-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 limit Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	2 x DIMM slots, max. 128GB, DDR5 Supports up to 8800+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.	2 x DIMM slots, max. 128GB, DDR5 Supports up to 8800+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.

Storage interfaces and restrictionsDifferent Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	Total supports 1 x M.2 slot and 4 x SATA 6Gb/s ports* Intel® Core™ Ultra Processors (Series 2) M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode) 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 mode) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.

Expansion slots and restrictions Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	Intel® Core™ Ultra Processors (Series 2) 1 x PCIe 4.0 x16 slot Intel® B860 Chipset 2 x PCIe 4.0 x1 slots - 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 4.0 x16 slot Intel® B860 Chipset 2 x PCIe 4.0 x1 slots - 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 B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	Rear USB (Total 6 ports) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) Front USB (Total 7 ports) 1 x USB 5Gbps 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 * USB Type-C® power delivery output: max. 5V/3A ** USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth.	Rear USB (Total 6 ports) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) Front USB (Total 7 ports) 1 x USB 5Gbps 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 * 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-panel portsDifferent Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) 1 x HDMI™ port 1 x Realtek 2.5Gb Ethernet 3 x Audio jacks	1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 3 x USB 2.0 ports (3 x Type-A) 1 x DisplayPort 1 x HDMITM port 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port
Audio interfaces Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-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 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.

Network interfaces and requirementsDifferent Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	*1 x Realtek 2.5Gb Ethernet ASUS LANGuard; M.2 slot only (Key E, CNVi & PCIe) * Wi-Fi module is sold separately.**	1 x Realtek 2.5Gb Ethernet ASUS LANGuard

Internal headers and connectorsDifferent Sources ASUS B860M-E Manufacturer specification ASUS B860M-E — official Global technical specifications ASUS PRIME B860M-K-CSM Manufacturer specification ASUS PRIME B860M-K-CSM — official UK technical specifications	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 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps 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 Front Panel Audio header (F_AUDIO) 1 x M.2 slot (Key E) 1 x S/PDIF Out header 1 x 10-1 pin Front Panel System 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 5Gbps 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 2 x Addressable Gen2 headers 1 x Aura RGB header 1 x Clear CMOS 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 Panel System header

First product manufacturer source Second product manufacturer source

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ASUS B860M-E-CSM

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

Prices & product profile

ASUS B860M-BRO-CSM

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

Prices & product profile

ASUS B860M-BRO

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

Prices & product profile

ASUS B860M AYW GAMING WIFI

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.