MSI MAG B860M MORTAR WIFI mATX Motherboard: LGA 1851 CPU Socket, Intel B860 Chipset, Thunderbolt 4
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MSI MAG B860M MORTAR WIFI — Thunderbolt 4, 5G LAN and Wi-Fi 7 for Core Ultra 200S
A next-generation Micro-ATX gaming motherboard built on Intel B860 for Intel Core Ultra 200S Series processors on socket LGA 1851. Armed with a 12+1+1+1 Phase 60A DrMOS VRM, 40Gbps Thunderbolt 4 Type-C, 5G Gaming LAN plus Wi-Fi 7, PCIe 5.0 x16 Steel Armor, and DDR5-9200+ MT/s (O.C.).
Board Map
Every connector, located before you unbox
Intel LGA 1851 Socket — Centre
Supports Intel Core Ultra 200S Series processors with dedicated NPU acceleration.
12+1+1+1 60A DrMOS VRM Heatsinks — Top & Left
Heavy extended heatsinks with 7W/mK thermal pads maintain thermal equilibrium under full multi-threaded CPU rendering.
4 × DDR5 DIMM Slots with Memory Boost — Right
Dual-channel DDR5 supporting up to 256 GB and extreme overclocking up to 9200+ MT/s (O.C.).
PCIe 5.0 x16 Steel Armor Slot — Centre
Reinforced PCIe 5.0 graphics slot providing 128 GB/s bandwidth with EZ PCIe Release.
Lightning Gen5 M.2 Socket — Under Heatsink
Dedicated PCIe 5.0 x4 NVMe slot covered by tool-free EZ M.2 Shield Frozr II.
4 × SATA 6Gb/s Ports — Lower Right
Right-angled storage ports for SATA hard drives and SSDs.
Power Delivery & Thermals
What feeds the socket, and what keeps it steady12+1+1+1 Phase 60A DrMOS System
Engineered to deliver clean, unthrottled power to Intel Core Ultra desktop processors under full workloads.
Thunderbolt 4 Type-C (40Gbps)
Built-in 40 Gbps Thunderbolt 4 port supports ultra-fast external storage, high-resolution displays, and 15W Power Delivery.
Realtek 5G LAN & Wi-Fi 7
Next-gen 5 Gbps wired Ethernet combined with Wi-Fi 7 320MHz wireless for ultra-low latency gaming.
EZ DIY Tool-Free Mechanisms
Includes EZ M.2 Clip II, EZ M.2 Shield Frozr II, EZ PCIe Release, and EZ Antenna for effortless hardware installation.
Lane Map
Interface speed rating & capability relative to modern motherboard standardsRear I/O Bay
Exactly what appears on the back of your case
Will It Fit Your Build?
Check these before you add to cartProcessor
Supports Intel Core Ultra 200S Series processors on socket LGA 1851.
Memory
DDR5 only — 4 DIMM slots supporting up to 256 GB and speeds up to 9200+ MT/s.
Storage
PCIe 5.0 x4 M.2 slot plus PCIe 4.0 M.2 slots (with EZ Shield Frozr II) and 4 SATA ports.
Thunderbolt
Built-in 40Gbps Thunderbolt 4 Type-C on rear panel.
Networking
Wired 5G LAN plus next-gen Wi-Fi 7 wireless.
Case
Micro-ATX form factor (24.4 cm x 24.4 cm) — fits standard Micro-ATX and ATX cases.
Full Specification Sheet
MSI MAG B860M MORTAR WIFI| CPU Socket | Intel LGA 1851 |
| CPU Support | Intel Core Ultra Processors (Series 2) |
| Chipset | Intel B860 Chipset |
| Form Factor | Micro-ATX (24.38 cm x 24.38 cm) |
| Power Design | 12+1+1+1 phase with 60A DrMOS power stages |
| Memory Slots | 4 × DDR5 DIMM, dual channel |
| Max Memory | 256 GB (up to DDR5-9200+ MT/s OC) |
| Primary Graphics Slot | 1 × PCIe 5.0 x16 Steel Armor (EZ PCIe Release) |
| Secondary PCIe Slot | 1 × PCIe 4.0 x16 (x4 mode) |
| M.2 Storage Sockets | 1 × M.2 PCIe 5.0 x4 + 2 × M.2 PCIe 4.0 x4 (with Shield Frozr) |
| SATA Ports | 4 × SATA 6 Gb/s |
| Thunderbolt | 1 × Thunderbolt 4 Type-C (40Gbps) with 15W PD & DP |
| Wireless Networking | Wi-Fi 7 (802.11be, 320MHz) + Bluetooth 5.4 |
| Ethernet LAN | Realtek 5 Gbps Gaming LAN |
| Audio | Realtek ALC897 7.1-Channel HD Audio + Optical S/PDIF |
