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A dark green Micro ATX motherboard with silver heatsinks, two DDR5 slots and a full-length PCIe x16 slot

MSI

MSI PRO B860M-B LGA 1851 Intel B860 DDR5 Micro ATX Motherboard

SKU CH-4TY8-C8NNC

Supports Intel Core Ultra Series 2 processors with dual-channel DDR5 up to 9066 MT/s, PCIe 5.0 graphics slot, Gen 5 M.2, 5G LAN and HDMI 2.1 output

  • Supports Intel Core Ultra Series 2 processors for LGA 1851 socket
  • Dual-channel DDR5 memory overclocked to 9066 MT/s for high bandwidth
  • 6-phase direct power with 8-pin CPU connector and 6-layer PCB
  • Extended heatsink with 7W/mK thermal pads and M.2 Shield Frozr cooling
  • PCIe 5.0 x16 slot and Lightning Gen 5 x4 M.2 for fast storage and graphics

Designed for Intel Core Ultra Series 2 builders

This Micro ATX motherboard uses the Intel B860 chipset and LGA 1851 socket to support Intel Core Ultra Processors (Series 2). It provides two DDR5 UDIMM slots with a maximum capacity of 128 GB and dual-channel architecture. The board targets system builders who want a compact foundation for modern Intel platforms without excess expansion slots.

Thermals managed by extended heatsinks

Frozr Guard equips an extended heatsink, MOSFET thermal pads rated for 7W/mK, additional choke thermal pads and an M.2 Shield Frozr. A direct 6-phase power design with P-PAK and an 8-pin CPU power connector delivers stable current to the processor. These features work together to maintain lower component temperatures during sustained workloads.

EZ clips simplify M.2 and PCIe installation

EZ M.2 Clip II and EZ PCIe Clip II allow tool-free mounting of storage drives and graphics cards. The board includes one PCIe 5.0 x16 slot from the CPU and one PCIe 4.0 x1 slot. Onboard graphics outputs comprise HDMI 2.1 and DisplayPort 1.4, each capable of 4K 60 Hz when the installed processor provides integrated graphics.

Points forts

  • Supports Intel Core Ultra Series 2 processors for LGA 1851 socket
  • Dual-channel DDR5 memory overclocked to 9066 MT/s for high bandwidth
  • 6-phase direct power with 8-pin CPU connector and 6-layer PCB
  • Extended heatsink with 7W/mK thermal pads and M.2 Shield Frozr cooling
  • PCIe 5.0 x16 slot and Lightning Gen 5 x4 M.2 for fast storage and graphics

Caractéristiques

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Questions sur cet article

How do I fit the CPU into the LGA 1851 socket without bending pins?

Align the triangle marker on the processor with the socket corner, lower it straight down without pressure, then close the retention lever until it clicks. The board has double-sided DIMM latches so install memory before the cooler.

Which thermal pads will need replacing after a few years of heavy loads?

The MOSFET pads rated for 7W/mK and the extra choke pads under the extended heatsink degrade first; peel them off and apply fresh pads of the same thickness when temperatures climb.

At what memory speed does the board hit its validated ceiling with a two-rank kit?

7200 MT/s is the highest supported overclock for a 1DPC 2R configuration; pushing further is not validated and can cause instability.

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