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ASRock B860 Pro RS specifications and in-depth review

ASRock B860 Pro RS

Manufacturer: ASRock

The ASRock B860 Pro RS is an ATX form factor motherboard designed for Intel's LGA 1851 platform, built around the B860 chipset. It carries a 3-year warranty and includes RGB lighting along with dual BIOS support, making it a reasonably well-equipped option for users building or upgrading a modern desktop system.

On the memory side, the board accommodates up to 256 GB of DDR5 RAM across four slots in a dual-channel configuration, with standard speeds up to 5600 MHz and overclocked profiles reaching 8666 MHz. Expansion is handled through one PCIe 5.0 x16 slot and one PCIe 4.0 x16 slot, while storage options include three M.2 sockets and four SATA 3 connectors with support for RAID 0, 1, 5, and 10. The rear I/O provides six USB 3.2 Gen 1 Type-A ports, one USB 3.2 Gen 2x2 Type-C port, HDMI 2.1 and DisplayPort outputs, and a single RJ45 Ethernet port, with 7.1-channel audio rounding out the connectivity picture.

Pros
  • Supports DDR5 memory across four slots with a maximum capacity of 256 GB, offering substantial headroom for memory-intensive workloads
  • Overclocked RAM speeds can reach up to 8666 MHz, providing meaningful flexibility for users who want to push memory performance
  • Includes both a PCIe 5.0 x16 and a PCIe 4.0 x16 slot, accommodating current-generation expansion cards
  • Three M.2 sockets alongside four SATA 3 connectors give a solid range of storage options
  • Seven fan headers allow for thorough cooling control across the system
  • Dual BIOS adds a useful layer of protection against failed firmware updates
Cons
  • No Wi-Fi or Bluetooth built in, requiring additional hardware for wireless connectivity
  • Manual CMOS reset is not supported, which can complicate BIOS recovery in certain situations
  • No USB 3.2 Gen 2 Type-A ports on the rear I/O, limiting high-speed transfers for standard USB-A devices
  • Only two USB 2.0 rear ports, which may feel restrictive for users with multiple legacy peripherals
  • No S/PDIF output, reducing options for digital audio passthrough to external receivers
Who is this for?

This board is a solid fit for users building a capable desktop system on Intel's current LGA 1851 platform who want meaningful storage flexibility and room to grow. With three M.2 sockets, four SATA 3 connectors, and full RAID 0/1/5/10 support, it suits those managing multiple drives or running redundant storage setups. The seven fan headers and dual BIOS make it a reasonable choice for enthusiasts who want solid cooling control and firmware resilience, while the overclockable DDR5 memory support up to 8666 MHz appeals to users looking to push system memory beyond stock speeds.

Who is this NOT for?

Users who depend on wireless connectivity will find this board unsuitable out of the box, as it lacks both Wi-Fi and Bluetooth, requiring separate adapters. It is also a poor match for those needing high-speed USB on rear Type-A ports, since no USB 3.2 Gen 2 Type-A outputs are present. Additionally, anyone requiring digital audio passthrough via S/PDIF, or needing Thunderbolt or USB 4 connectivity for high-bandwidth peripherals, will find the feature set insufficient for those workflows.

General info:

CPU socket LGA 1851
chipset B860
form factor 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 254 mm
width 305 mm
Has integrated CPU ✕

The ASRock B860 Pro RS is built around the LGA 1851 socket and the B860 chipset, housed in a standard ATX form factor measuring 305 mm wide and 254 mm tall. It features a single CPU socket without an integrated processor or integrated graphics, and it does not include Wi-Fi or Bluetooth connectivity. The board supports easy overclocking, includes RGB lighting, and comes equipped with dual BIOS, though manual CMOS reset is not supported. A 3-year warranty is included, rounding out a fairly straightforward set of general characteristics.

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 ✕

The board supports DDR5 memory across four slots in a dual-channel configuration, with a maximum capacity of 256 GB. Standard RAM speeds top out at 5600 MHz, while overclocked profiles can reach 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) 6
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 offers a total of six USB 3.2 Gen 1 Type-A ports alongside two USB 2.0 ports, and one USB 3.2 Gen 2x2 Type-C port. There are no USB 3.2 Gen 2 Type-A or Type-C ports, and no USB 4 or Thunderbolt connectivity of any kind. Video output is handled through an HDMI port and one DisplayPort output, while VGA, DVI, and eSATA are absent. A single RJ45 port provides wired network connectivity, and there are no PS/2 ports present.

Connectors:

USB 3.2 Gen 1 ports (through expansion) 2
USB 2.0 ports (through expansion) 4
SATA 3 connectors 4
fan headers 7
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

For internal connectivity, the board provides three M.2 sockets and four SATA 3 connectors for storage, with no SATA 2, U.2, or mSATA options available. Expansion headers include two USB 3.2 Gen 1 ports, two USB 3.0 ports, and four USB 2.0 ports, all accessible through panel connectors. Cooling is well catered for with seven fan headers on board, and a TPM connector is also present for security module support.

Expansion slots:

PCIe 4.0 x16 slots 1
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 0
PCIe x8 slots 0

The board offers two full-length PCIe slots: one PCIe 5.0 x16 and one PCIe 4.0 x16, covering the primary expansion needs for modern add-in cards. There are no PCIe 3.0, 2.0, x8, x4, or x1 slots, and no legacy PCI slots are present.

Audio:

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

The board supports 7.1-channel audio with three analog audio connectors on the rear panel. There is no S/PDIF output available.

Storage:

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

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

Final Verdict

The ASRock B860 Pro RS is a well-specified ATX motherboard for the LGA 1851 platform that covers the essentials competently without straying into excess. Its DDR5 support with overclocked speeds up to 8666 MHz, combined with three M.2 sockets and broad RAID capability, makes it a practical choice for users who prioritize storage depth and memory headroom. The absence of built-in wireless and the limited rear USB options mean it works best in wired desktop environments where those gaps can be addressed externally. For builders who need a dependable B860-based foundation with room for both performance tuning and storage expansion, the B860 Pro RS delivers a coherent and capable package.

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