Gigabyte B860M K VS MSI Pro B860M-C Ex

At their core, the Gigabyte B860M K and MSI Pro B860M-C Ex are built on identical foundations: both use the LGA 1851 socket with the B860 chipset, adopt the Micro-ATX form factor, and share the same HDMI 2.1 output, dual BIOS protection, and a 3-year warranty. Neither board includes Wi-Fi, Bluetooth, RGB lighting, or an integrated CPU or GPU, so buyers needing wireless connectivity will require a separate adapter regardless of which they choose.

The only measurable difference between the two lies in physical dimensions. The Gigabyte measures 215 × 244 mm while the MSI comes in at 220 × 243.8 mm — a difference of just 5 mm in height and a negligible 0.2 mm in width. In practice, both fit comfortably in any case that supports Micro-ATX, so this gap has no real-world impact on build compatibility.

For this spec group, the two boards are effectively tied. Every feature and limitation that matters — chipset, socket, form factor, display output, BIOS resilience, and warranty coverage — is identical. Neither product offers a meaningful general-info advantage over the other, and the buying decision should rest entirely on differences in other spec categories such as memory support, connectivity, or pricing.

Both the Gigabyte B860M K and the MSI Pro B860M-C Ex have identical specifications in terms of memory. Both motherboards support a maximum memory capacity of 128GB and feature two memory slots. They support DDR5 memory and operate with dual memory channels. The maximum supported RAM speed is 6400 MHz, while the overclocked RAM speed is 8800 MHz on both models. Additionally, neither motherboard supports ECC memory.

Given that all memory-related specifications match exactly between the two products, there are no differences to highlight in this category.

The Gigabyte B860M K and MSI Pro B860M-C Ex differ slightly in terms of available ports. Both motherboards feature 4 USB 3.2 Gen 1 ports (USB-A) and 2 USB 2.0 ports. The Gigabyte B860M K does not include any USB 3.2 Gen 2 ports (USB-A or USB-C), USB 4 ports, or Thunderbolt ports, while the MSI Pro B860M-C Ex offers 1 USB 3.2 Gen 2 port (USB-A) and 1 USB 3.2 Gen 2 port (USB-C), as well as a USB Type-C port.

Additionally, both motherboards have an HDMI output and 1 RJ45 Ethernet port. However, the MSI Pro B860M-C Ex includes more display options with a DisplayPort output and a DVI output, while the Gigabyte B860M K does not have DisplayPort or DVI outputs. The MSI Pro B860M-C Ex also provides a VGA connector, which the Gigabyte B860M K lacks.

In terms of legacy connections, both motherboards include 1 PS/2 port. The Gigabyte B860M K has no eSATA ports or Thunderbolt 3/4 support, which is consistent with the MSI Pro B860M-C Ex, though the MSI motherboard includes more display output options.

The Gigabyte B860M K and MSI Pro B860M-C Ex share identical specifications when it comes to connectors. Both motherboards offer 2 USB 3.2 Gen 1 ports (through expansion), 4 USB 2.0 ports (through expansion), 2 USB 3.0 ports (through expansion), and 4 SATA 3 connectors. They also feature 3 fan headers and 2 M.2 sockets, which are the same for both models.

Both motherboards are equipped with a TPM connector, but neither supports U.2 or mSATA connectors, and both have 0 SATA 2 connectors.

Given that the connector specifications are identical between the two motherboards, there are no differences to highlight in this category.

The Gigabyte B860M K and MSI Pro B860M-C Ex differ in their expansion slot configurations. The Gigabyte B860M K is equipped with 1 PCIe 4.0 x16 slot and 1 PCIe x1 slot, with no PCI slots or other types of PCIe slots available. In contrast, the MSI Pro B860M-C Ex features 1 PCIe 5.0 x16 slot, 2 PCIe x1 slots, and 1 PCI slot, while it does not include any PCIe 2.0 x16, PCIe x4, or PCIe x8 slots.

While both motherboards provide a PCIe x1 slot, the Gigabyte B860M K supports only PCIe 4.0 for its x16 slot, whereas the MSI Pro B860M-C Ex opts for PCIe 5.0 in that position. Additionally, the MSI board offers a PCI slot that the Gigabyte board lacks.

Overall, while both motherboards offer basic expansion options, the MSI Pro B860M-C Ex has more variety with an additional PCI slot and a more advanced PCIe 5.0 x16 slot compared to the Gigabyte B860M K's single PCIe 4.0 x16 slot.

Both the Gigabyte B860M K and the MSI Pro B860M-C Ex offer the same audio features. Both motherboards support 7.1 audio channels, include 3 audio connectors, and do not feature an S/PDIF Out port.

With identical audio specifications, there are no differences between the two products in this category.

The Gigabyte B860M K and MSI Pro B860M-C Ex share the same storage capabilities when it comes to RAID support. Both motherboards support RAID 1, RAID 10 (1+0), and RAID 5 configurations. Neither motherboard supports RAID 0+1, but both do support RAID 0.

There are no differences between the two motherboards in terms of RAID functionality.