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MSI Pro B860M-C Ex specifications and in-depth review

MSI Pro B860M-C Ex

Manufacturer: MSI

The MSI Pro B860M-C Ex is a Micro-ATX motherboard built around the B860 chipset and designed for Intel's LGA 1851 platform. It carries a compact footprint of 243.8 × 220 mm while still accommodating a solid set of features for everyday builds and workstation use. The board ships with a three-year warranty and includes dual BIOS support, giving users a fallback option should a firmware update go wrong.

Memory support reaches up to 128 GB of DDR5 across two slots running at a rated 6400 MHz, with overclocked profiles pushing as high as 8800 MHz. Storage options include two M.2 sockets and four SATA 3 connectors, with full support for RAID 0, 1, 5, and 10. The rear I/O provides a practical mix of connectivity including one USB 3.2 Gen 2 Type-A, one USB 3.2 Gen 2 Type-C, four USB 3.2 Gen 1 Type-A ports, HDMI 2.1, DisplayPort, DVI, and VGA outputs. Audio is handled by a 7.1-channel solution with three rear connectors, and a single RJ45 port covers wired networking.

Pros
  • Dual BIOS support provides a built-in recovery option if a firmware update fails
  • DDR5 memory with overclocked profiles reaching up to 8800 MHz offers meaningful headroom for memory-sensitive workloads
  • A single PCIe 5.0 x16 slot ensures compatibility with the latest discrete graphics cards
  • Full RAID support across levels 0, 1, 5, and 10 gives users flexibility for both performance and redundancy storage setups
  • The rear I/O includes a broad mix of display outputs — HDMI 2.1, DisplayPort, DVI, and VGA — accommodating a wide range of monitor types
  • Three-year warranty period provides longer coverage than many boards in this category
Cons
  • Only two memory slots limit future upgrade paths and leave no room for incremental expansion
  • No Wi-Fi or Bluetooth means wireless connectivity requires additional hardware
  • Lacks a clear CMOS button, making BIOS recovery less convenient in the event of a failed configuration
  • No S/PDIF Out port restricts digital audio output options for users relying on external audio equipment
  • With only three fan headers, more complex cooling setups may require a separate fan hub
Who is this for?

This board is a solid fit for users building a compact desktop system around Intel's LGA 1851 platform who want modern features without a full ATX footprint. The PCIe 5.0 x16 slot makes it a reasonable choice for anyone pairing it with a current-generation discrete GPU, while RAID 0, 1, 5, and 10 support suits small office or home setups that need basic storage redundancy. Users who work with multiple monitor types will also appreciate the range of display outputs, and those who value firmware reliability will find the dual BIOS a practical safeguard for a long-term build.

Who is this NOT for?

This board is not well-suited for users who need wireless connectivity out of the box, as it lacks both Wi-Fi and Bluetooth, requiring additional hardware for any wireless use case. With only two memory slots, it is a poor fit for workstation users who anticipate significant memory expansion over time, and the absence of ECC support rules it out for environments where data integrity is critical. Those planning complex cooling arrangements with multiple fans may also find the three fan headers insufficient without investing in a separate hub.

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 220 mm
width 243.8 mm
Has integrated CPU ✕

The MSI Pro B860M-C Ex uses the LGA 1851 socket paired with the B860 chipset and comes in a Micro-ATX form factor measuring 243.8 × 220 mm, making it a compact yet capable platform choice. It supports easy overclocking and features dual BIOS for added firmware reliability, though it does not include integrated graphics, an integrated CPU, RGB lighting, or a quick CMOS reset button. Wireless connectivity is absent, as the board ships without Wi-Fi or Bluetooth. Video output is handled through an HDMI 2.1 port, and the board is covered by a three-year warranty.

Memory:

maximum memory amount 128GB
RAM speed (max) 6400 MHz
overclocked RAM speed 8800 MHz
memory slots 2
DDR memory version 5
memory channels 2
Supports ECC memory ✕

This board supports DDR5 memory across two slots in a dual-channel configuration, with a maximum capacity of 128 GB. The rated RAM speed tops out at 6400 MHz, while overclocked profiles can reach up to 8800 MHz for users looking to push performance further. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A) 1
USB 3.2 Gen 1 ports (USB-A) 4
USB 3.2 Gen 2 ports (USB-C) 1
USB 3.2 Gen 1 ports (USB-C) 0
USB 2.0 ports 2
USB 3.2 Gen 2x2 ports 0
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 1
has a VGA connector ✓
PS/2 ports 1

The rear I/O offers a well-rounded USB lineup consisting of one USB 3.2 Gen 2 Type-A port, four USB 3.2 Gen 1 Type-A ports, one USB 3.2 Gen 2 Type-C port, and two USB 2.0 ports; there are no USB 3.2 Gen 1 Type-C, Gen 2x2, USB 4, Thunderbolt 3, or Thunderbolt 4 ports. Display output is covered by HDMI, one DisplayPort, one DVI, and a VGA connector, giving flexibility for a range of monitors. Rounding out the rear panel are one RJ45 ethernet port and one PS/2 port, while eSATA connectivity is not included.

Connectors:

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

For storage, the board provides two M.2 sockets and four SATA 3 connectors, with no SATA 2, mSATA, or U.2 sockets available. Internal expansion headers include two USB 3.2 Gen 1 ports, two USB 3.0 ports, and four USB 2.0 ports, all accessible through expansion. Cooling is managed via three fan headers, and a TPM connector is present 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 2
PCI slots 1
PCIe 2.0 x16 slots 0
PCIe x4 slots 0
PCIe x8 slots 0

The board features one PCIe 5.0 x16 slot as its primary expansion lane for discrete cards, alongside two PCIe x1 slots and one legacy PCI slot for additional peripherals. There are no PCIe 2.0, 3.0, or 4.0 x16 slots, and no PCIe x4 or x8 slots are present.

Audio:

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

Audio support extends to 7.1 channels, delivered through three analog connectors on the rear panel. There is no S/PDIF Out port available for digital audio output.

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 broad range of use cases from performance striping to mirroring and combined setups. RAID 0+1 is not supported.

Final Verdict

The MSI Pro B860M-C Ex is a compact Micro-ATX motherboard that delivers a well-rounded feature set for LGA 1851 builds where space is a consideration but modern capability is still expected. Its PCIe 5.0 x16 slot, DDR5 memory support with high overclocked headroom, and comprehensive RAID options make it a capable foundation for both everyday desktop and light storage-oriented configurations. Dual BIOS and a three-year warranty add a layer of long-term reliability that users will appreciate. Those requiring wireless connectivity, extensive memory expansion, or ECC support will need to look elsewhere, but for a straightforward, wired Micro-ATX build on the B860 platform, this board covers the essentials without unnecessary compromise.

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