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ASUS · LGA 1851 · B860

ASUS Prime B860-PLUS-CSM

ATX · DDR5 · 4 DIMMs · 8-phase VRM

Quality
53
VRM
32
Value
77
Amazon
$130
ASUS Prime B860-PLUS-CSM
View ASUS Prime B860-PLUS-CSM Gallery in high resolution
$130
Available Updated 3 days, 22 hours ago Prime FBA
Overall53.0
VRM32.0
Chipset67.0
Expansion / storage78.0
Connectivity43.0
Audio45.0
Quality / price77.5
$130 on Amazon Motherboard table Compare this motherboard

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Written analysis

ASUS Prime B860-PLUS-CSM at a glance

The ASUS Prime B860-PLUS-CSM uses the ATX form factor, LGA 1851 socket, and B860 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 32.0, placing the power delivery in the entry-level class. The board lists 8 CPU power phases, 80 A power stages in a 8+1+1 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 78.0: well equipped . The platform supports PCIe 5.0. Physical expansion includes 2 ×16 slots.

On-board storage consists of 3 M.2 slots supporting PCIe 5.0 x4, PCIe 4.0 x4 and 4 SATA ports. Supported M.2 lengths are listed as 22110, 2280, 2260, 2242. That is enough NVMe capacity for a multi-drive gaming or creator setup without immediately relying on an add-in card.

Connectivity and rear I/O

The connectivity score is 43.0, rated essential. There is no recorded onboard Wi-Fi ; wired networking is 1 x Realtek 2.5Gb Ethernet at up to 2500 Mbps. The recorded USB provision is 6 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 53.00, 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 77.5—an excellent value relative to the other boards in the catalog.

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 B860-PLUS-CSM
Chipset / socket
B860 / LGA 1851
Form factor
ATX
Launch price
—
Amazon price
$130
Availability
In stock
Price updated
3 days, 22 hours ago

VRM

CPU phases
8 (80 A)
Power design
8+1+1
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

Storage

M.2 slots
3
M.2 lengths
22110, 2280, 2260, 2242
M.2 modes
PCIe 5.0 x4, PCIe 4.0 x4
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
2
Rear USB 3.2 Gen 1 Type-A 5 Gbps
1
Rear USB 3.2 Gen 2 Type-A 10 Gbps
2
Rear USB 3.2 Gen 2×2 Type-C 20 Gbps
1
Front USB 3.2 Gen 1 Type-C 5 Gbps
1
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
2
Header USB4 Type-C
1

Networking

Ethernet
1 x Realtek 2.5Gb Ethernet
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
Not included
Bluetooth
No

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 ASUS Enhanced Memory Profile III (AEMP III) and DIMM Fit. Supported memory types, data rate, and number of DRAM modules vary depending on the CPU and memory configuration. Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Display notes
Graphics specifications may vary between CPU types. VGA resolution support depends on processors' or graphic cards' resolution.
Expansion notes
The PCIe 4.0 x16 slot provided by 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, 22110 · Chipset
M.2_3
4.0 4 · 2242, 2260, 2280 · Chipset
RAID
SATA (['0', '1', '5', '10'])
USB notes
Includes one internal Thunderbolt™ (USB4®) header.
Audio notes
Features include Jack-detection, Multi-streaming, Front Panel Jack-retasking, and support for up to 24-Bit/192 kHz playback. It also has 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
M.2 slot only (Key E, CNVi & PCIe). Wi-Fi module is sold separately.
Button notes
The motherboard features a Clear CMOS header, not a button.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 4 chassis · 3 ARGB · 1 RGB
Other headers
Front audio · System panel · TPM · Thunderbolt
Dimensions
30.5 cm x 24.4 cm

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

Amazon

Price history

Nearby quality

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VRM fit

VRM-appropriate CPUs

LGA 1851 processors whose TDP sits in this board’s VRM window. Socket match is required; chipset extras still matter on sTR5. This is a power-delivery filter, not a ranked CPU guide.

Open LGA 1851 CPUs in the CPU table

Discussion

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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
Support 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/. 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

1 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.

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)
- 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 3 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 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
M.2_3 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.

USB

Rear USB (Total 6 ports)
1 x USB 20Gbps port (1 x USB Type-C®)
2 x USB 10Gbps ports (2 x Type-A)
1 x USB 5Gbps port (1 x Type-A)
2x USB 2.0 ports (2 x Type-A)
Front USB (Total 7 ports)
1 x USB 5Gbps port (1 x USB Type-C®)
1 x USB 5Gbps header supports additional 2 USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports

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
4 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
3 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 header support 4 additional USB 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 (14-1pin)
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®)
2 x USB 10Gbps ports (2 x Type-A)
1 x USB 5Gbps port (1 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI™ port
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks

Wireless

M.2 slot only (Key E, CNVi & PCIe)*
* Wi-Fi module is sold separately.

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.

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