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ASRock B860M Pro-A specifications and in-depth review

ASRock B860M Pro-A

Manufacturer: ASRock

The ASRock B860M Pro-A is a Micro-ATX motherboard designed around Intel's LGA 1851 platform and B860 chipset, measuring 244 mm × 244 mm. It carries a 3-year warranty and supports easy overclocking, making it a straightforward option for users looking to extract more performance from compatible Intel processors without extensive manual tuning. The board does not include integrated Wi-Fi, Bluetooth, or onboard graphics, so those capabilities would need to come from the CPU or add-in cards.

Memory support extends to four DDR5 slots across two channels, with a rated maximum of 5600 MHz and overclocked headroom up to 8666 MHz, accommodating up to 256 GB total. Expansion is handled by one PCIe 5.0 x16 slot and one PCIe x4 slot, while storage options include three M.2 sockets, four SATA 3 connectors, and full RAID 0, 1, 5, and 10 support. On the rear panel, connectivity includes three USB 3.2 Gen 1 Type-A ports, two USB 2.0 ports, one USB 3.2 Gen 2x2 Type-C port, HDMI 2.1, one DisplayPort output, and a single RJ45 Ethernet port, complemented by a 7.1-channel audio solution with three audio connectors.

Pros
  • Supports DDR5 memory with overclocked speeds up to 8666 MHz, offering significant headroom for memory-intensive workloads
  • Three M.2 sockets provide ample high-speed storage expansion within a compact Micro-ATX footprint
  • A PCIe 5.0 x16 slot ensures compatibility with the latest generation of discrete graphics cards and add-in devices
  • Dual BIOS adds a layer of firmware reliability, reducing the risk of a failed update leaving the board non-functional
  • Full RAID 0, 1, 5, and 10 support gives users meaningful flexibility in how they configure storage arrays
  • Six fan headers allow for thorough cooling management across the system
Cons
  • No built-in Wi-Fi or Bluetooth requires additional hardware for wireless connectivity
  • Lacks USB 3.2 Gen 2 Type-A ports on the rear panel, with the faster USB options limited to a single Type-C connector
  • ECC memory is not supported, limiting suitability for error-sensitive or workstation-class applications
  • No S/PDIF Out port restricts digital audio output options for users who rely on optical connections
  • The absence of a quick CMOS reset feature can make BIOS recovery less straightforward in certain situations
Who is this for?

This board is a solid fit for users building a capable Intel LGA 1851 desktop system within a Micro-ATX chassis, particularly those who want to take advantage of DDR5 memory with overclocked speeds up to 8666 MHz. The three M.2 sockets and full RAID support make it well-suited for users who prioritize fast, flexible storage configurations, including small workstation setups that benefit from data redundancy. The PCIe 5.0 x16 slot also makes it a reasonable platform for users planning to pair it with a current-generation discrete GPU, while the six fan headers appeal to those who want granular control over system thermals.

Who is this NOT for?

Users who need wireless connectivity out of the box will find this board lacking, as there is no built-in Wi-Fi or Bluetooth, which can be a practical limitation in environments where running a wired connection is not convenient. It is also a poor match for professionals whose workflows depend on ECC memory support, such as those working in data integrity-sensitive fields, since that capability is entirely absent. Additionally, anyone requiring Thunderbolt connectivity, high-speed USB 4 ports, or a legacy S/PDIF digital audio output will need to look elsewhere, as none of these are available on this board.

General info:

CPU socket LGA 1851
chipset B860
form factor Micro-ATX
supports Wi-Fi ✕
Has Bluetooth ✕
HDMI version HDMI 2.1
Easy to overclock ✓
has RGB lighting ✕
Easy to reset BIOS ✕
Has dual BIOS ✓
CPU sockets 1
Has integrated graphics ✕
warranty period 3 years
height 244 mm
width 244 mm
Has integrated CPU ✕

The ASRock B860M Pro-A uses the LGA 1851 socket and is compatible with the B860 chipset, housed in a Micro-ATX form factor measuring 244 mm × 244 mm. It supports a single CPU and does not include an integrated CPU or integrated graphics. The board features dual BIOS for added firmware reliability and supports easy overclocking, though it does not offer a quick CMOS reset function. Wi-Fi and Bluetooth are not built in, and the board carries no RGB lighting. Video output is available via an HDMI 2.1 port, and the product is backed by a 3-year warranty.

Memory:

maximum memory amount 256GB
RAM speed (max) 5600 MHz
overclocked RAM speed 8666 MHz
memory slots 4
DDR memory version 5
memory channels 2
Supports ECC memory ✕

This board supports DDR5 memory across four slots arranged in a dual-channel configuration, with a maximum capacity of 256 GB. The rated top speed is 5600 MHz, and with overclocking enabled, memory can run at up to 8666 MHz. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A) 0
USB 3.2 Gen 1 ports (USB-A) 3
USB 3.2 Gen 2 ports (USB-C) 0
USB 3.2 Gen 1 ports (USB-C) 0
USB 2.0 ports 2
USB 3.2 Gen 2x2 ports 1
USB 4 40Gbps ports 0
USB 4 20Gbps ports 0
Thunderbolt 4 ports 0
Thunderbolt 3 ports 0
has an HDMI output ✓
DisplayPort outputs 1
RJ45 ports 1
Has USB Type-C ✓
eSATA ports 0
DVI outputs 0
has a VGA connector ✕
PS/2 ports 0

The rear I/O panel provides three USB 3.2 Gen 1 Type-A ports, two USB 2.0 ports, and one USB 3.2 Gen 2x2 Type-C port, while higher-speed options such as USB 4 and Thunderbolt are not present. Display output is handled by an HDMI port and one DisplayPort output, with no DVI or VGA connectors included. Networking is covered by a single RJ45 port, and there are no eSATA or PS/2 ports on this board.

Connectors:

USB 3.2 Gen 1 ports (through expansion) 2
USB 2.0 ports (through expansion) 4
SATA 3 connectors 4
fan headers 6
USB 3.0 ports (through expansion) 2
M.2 sockets 3
Has TPM connector ✓
U.2 sockets 0
Has mSATA connector ✕
SATA 2 connectors 0

Internal connectivity is well-covered, with three M.2 sockets and four SATA 3 connectors available for storage devices, while SATA 2 and U.2 sockets are absent, as is an mSATA connector. USB expansion headers include two USB 3.2 Gen 1 connectors and four USB 2.0 ports available through expansion, along with two additional USB 3.0 expansion ports. The board also includes six fan headers for cooling management and a TPM connector for security module support.

Expansion slots:

PCIe 4.0 x16 slots 0
PCIe 5.0 x16 slots 1
PCIe 3.0 x16 slots 0
PCIe x1 slots 0
PCI slots 0
PCIe 2.0 x16 slots 0
PCIe x4 slots 1
PCIe x8 slots 0

The board offers a total of two expansion slots: one PCIe 5.0 x16 slot for the primary add-in card and one PCIe x4 slot for additional expansion. There are no PCIe 4.0, 3.0, or 2.0 x16 slots, and no PCIe x1, x8, or legacy PCI slots are present.

Audio:

audio channels 7.1
Has S/PDIF Out port ✕
audio connectors 3

The onboard audio solution supports 7.1-channel output and provides three analog audio connectors on the rear panel. An S/PDIF Out port is not included.

Storage:

Supports RAID 1 ✓
Supports RAID 10 (1+0) ✓
Supports RAID 5 ✓
Supports RAID 0 ✓
Supports RAID 0+1 ✕

The board supports RAID 0, 1, 5, and 10 configurations, covering a range of performance and redundancy setups. RAID 0+1 is not supported.

Final Verdict

The ASRock B860M Pro-A is a competent Micro-ATX motherboard that delivers a well-rounded feature set for Intel LGA 1851 builds, anchored by strong DDR5 memory support and a PCIe 5.0 x16 slot that keeps the platform current with modern hardware. Three M.2 sockets, comprehensive RAID support, and six fan headers round out a specification list that serves general desktop and light workstation users well. That said, the absence of wireless connectivity, ECC memory support, and higher-speed USB options does narrow its appeal for users with more specialized requirements. On balance, it is a practical and feature-conscious choice for anyone putting together a capable Micro-ATX system on the Intel B860 platform who does not need those specific capabilities.

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