Skip to content

ASUS · LGA 1851 · B860M

ASUS Prime B860M-A WiFi-CSM

Micro-ATX · DDR5 · 4 DIMMs · 7-phase VRM · 6E

Quality
57
VRM
28
Value
64
Amazon
$169
ASUS Prime B860M-A WiFi-CSM
View ASUS Prime B860M-A WiFi-CSM Gallery in high resolution
$169
Available Updated 3 days, 15 hours ago Prime FBA
Overall56.8
VRM28.0
Chipset67.0
Expansion / storage79.0
Connectivity65.0
Audio45.0
Quality / price63.9
$169 on Amazon Motherboard table Compare this motherboard

Build with this motherboardSelect a CPU first so the Builder can confirm the socket and unlock this board. Choose the CPU first

Written analysis

ASUS Prime B860M-A WiFi-CSM at a glance

The ASUS Prime B860M-A WiFi-CSM uses the Micro-ATX form factor, LGA 1851 socket, and B860M chipset. This is a balanced mainstream platform: enough expansion and connectivity for a performance PC without paying only for flagship extras.

Memory support is DDR5 across 4 DIMM slots, with up to 256 GB and rated overclocked speeds up to 8666 MT/s. XMP / EXPO memory-profile support is recorded for easier tuning.

Best fit: a mainstream gaming, home, or office system with moderate expansion needs.

Power delivery

The calculated VRM score is 28.0, placing the power delivery in the entry-level class. The board lists 7 CPU power phases, 80 A power stages in a 7(80A) + 1(80A) + 1(80A) + 1(80A) layout. CPU power input is listed as 1. It is best paired with mainstream 65–105 W-class processors and good case airflow.

Expansion and storage

The expansion and storage score is 79.0: well equipped . The platform supports PCIe 5.0. Physical expansion includes 2 ×16 slots, and 1 ×1.

On-board storage consists of 2 M.2 slots and 4 SATA ports. Supported M.2 lengths are listed as 2242, 2260, 2280. The two-slot layout covers a typical OS-and-games or OS-and-project-drive setup.

Connectivity and rear I/O

The connectivity score is 65.0, rated adequate . Wireless networking is Wi-Fi 6E ; wired networking is Intel® B860 Chipset at up to 2500 Mbps. Bluetooth 5.3 is included. The recorded USB provision is 8 rear connections and 1 front-panel connections. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1, DisplayPort 1.4. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 45.0. This is a standard onboard solution using Realtek® ALC892/ALC897. It covers normal gaming and communication; demanding headphones or production work still benefit from an external interface. The rear panel has 3 analogue jacks.

Buying verdict

Overall quality is 56.80, a mainstream result. The essential platform features are covered, while premium I/O and tuning extras are more selective.

At the recorded Amazon price, the quality-to-price score is 63.9—a balanced value for its feature class.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
ASUS
Motherboard
ASUS Prime B860M-A WiFi-CSM
Chipset / socket
B860M / LGA 1851
Form factor
Micro-ATX
Launch price
—
Amazon price
$169
Availability
In stock
Price updated
3 days, 15 hours ago

VRM

CPU phases
7 (80 A)
Power design
7(80A) + 1(80A) + 1(80A) + 1(80A)
EPS connector
1

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8666 MT/s
Per DIMM
64 GB
XMP / EXPO
Yes

PCIe

Supported version
PCIe 5.0
x16 physical
2
x16 Gen 5
1
x16 Gen 4
1
x1 physical
1
x1 Gen 4
1

Storage

M.2 slots
2
M.2 lengths
2242, 2260, 2280
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4K@60Hz
DisplayPort
Yes · 1.4 · 4K@60Hz
USB-C DisplayPort
No

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
2
Rear USB 3.2 Gen 2 Type-A 10 Gbps
1
Rear USB 3.2 Gen 2×2 Type-C 20 Gbps
1
Front USB 3.2 Gen 2 Type-C 10 Gbps
1
Front USB-C PD
15 W
Header USB 2.0
2
Header USB 3.2 Gen 1 Type-A 5 Gbps
2
Header USB4 Type-C
1

Networking

Ethernet
Intel® B860 Chipset
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
6E
Bands
['2.4GHz', '5GHz', '6GHz']
Antenna connectors
2
Bluetooth
5.3

Audio

Chipset
Realtek® ALC892/ALC897
Analog jacks
3
Gold-plated jacks
No
Optical S/PDIF
No
Spatial audio
Rear output

Additional information

Memory notes
Supports Un-buffered and Clocked Unbuffered DIMM (CUDIMM). Features DIMM Fit and ASUS Enhanced Memory Profile III (AEMPIII). Non-ECC, un-buffered DDR5 memory supports On-Die ECC function. Supported memory types, data rate, and number of DRAM modules vary depending on the CPU and memory configuration.
Display notes
Graphics specifications may vary between CPU types. VGA resolution support depends on processors' or graphic cards' resolution. While installing the operating system, please ensure that your monitor is connected to the HDMI port on the back I/O panel or to a discrete graphics card.
Expansion notes
The PCIe 4.0 x16 slot from the Intel B860 Chipset supports x4 mode.
M.2_1
5.0 4 · 2242, 2260, 2280 · CPU
M.2_2
4.0 4 · 2242, 2260, 2280 · Chipset
RAID
SATA (['0', '1', '5', '10'])
USB notes
Front USB Type-C power delivery output: max. 5V/3A. The four rear USB 2.0 ports (USB_E1, USB_E2, USB_E3, USB_E4) share bandwidth. Includes one Thunderbolt (USB4) header.
Audio notes
Features Realtek 7.1 Surround Sound High Definition Audio CODEC. Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking, and up to 24-Bit/192 kHz playback. Includes Audio Shielding, premium audio capacitors, and 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.
Networking notes
WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later. The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.
Button notes
The motherboard includes a Clear CMOS header, but not a dedicated button.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 3 chassis · 3 ARGB · 1 RGB
Other headers
Front audio · System panel · TPM · Thunderbolt
Dimensions
24.4cm x 24.4cm

Extracted notes sit here. Official manufacturer copy is at the bottom of the page.

Amazon

Price history

Nearby quality

Similar motherboards

Boards on LGA 1851 close to ASUS Prime B860M-A WiFi-CSM on overall quality. Open the motherboard table to sort, filter, and compare side by side.

Compare these in the motherboard table

Discussion

Comments on ASUS Prime B860M-A WiFi-CSM

No comments yet.

Vendor copy

Official manufacturer data

Raw manufacturer text kept for reference. Structured specs above are extracted from this copy and are the source for scores and tables.

Memory

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.

Graphics

2 x DisplayPort**
1 x HDMI™ port***
 * Graphics specifications may vary between CPU types. Please refer to www.intel.com for any updates.
** Supports max. 4K@60Hz as specified in DisplayPort 1.4.
*** Supports 4K@60Hz as specified in HDMI 2.1.
***** VGA resolution support depends on processors' or graphic cards' resolution.
******While installing the operating system, please ensure that your monitor is connected to the HDMI port on the back I/O panel or to a discrete graphics card.

Expansion slots

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.

Storage

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.

USB

Rear USB (Total 8 ports)
1 x USB 20Gbps port (1 x USB Type-C®)
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.

Internal I/O

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

Rear I/O

1 x USB 20Gbps port (1 x USB Type-C®)
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 Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks

Wireless

Wi-Fi 6E
2x2 Wi-Fi 6E (802.11ax)
Supports 2.4/5/6GHz frequency band*
Bluetooth® v5.3**
* WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later
** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.

Audio

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.

Special features

ASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- ESD Guards
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- ProCool
- Pre-mounted I/O shield
Aura Sync
- Aura RGB header
- Addressable Gen2 headers

Privacy controls

Choose whether optional analytics may run. Necessary storage remains active because it supports security, login, requested preferences, and this choice.

Necessary Security, sessions, forms, and preferences you request.
Always active