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Micro-ATX motherboard in matte black with silver heatsinks and gold audio jacks

MSI

MSI ARSENAL GAMING B360M MORTAR Intel motherboard

SKU CH-3H5T-9TXM7

Micro ATX board for LGA 1151 300 Series CPUs with dual M.2 slots, four SATA 6Gb/s ports and DDR4 memory up to 64 GB

  • ProcessorSupports 9th/8th Gen Intel Core / Pentium Gold / Celeron pro
  • ChipsetIntel B360
  • Form factorMicro ATX
  • CPU socketLGA 1151 (300 Series)
  • Onboard video chipSupported only by CPU with integrated graphic:1 x DVI-D port
  • Memory slot count4 × 288pin (DDR4)
  • Supports 9th and 8th generation Intel Core processors with LGA 1151 socket
  • Four DDR4 slots run dual-channel memory up to 2666 MHz for 64 GB capacity
  • Two M.2 slots accept PCIe 3.0 x4 NVMe drives up to 32 Gb/s with Intel Optane ready
  • Steel-armoured PCIe 3.0 x16 slot protects heavy graphics cards from bending and EMI
  • Intel I219-V LAN and Realtek ALC892 audio deliver 1 Gbps networking and 7.1-channel sound

Socket and generation

This Micro ATX motherboard uses the Intel B360 chipset and an LGA 1151 (300 Series) socket. It accepts 9th and 8th generation Intel Core, Pentium Gold and Celeron processors. The board is not backward compatible with earlier LGA 1151 CPUs.

Sustained thermal behaviour

Extended heatsinks cover the PWM area to dissipate heat during prolonged multi-core workloads. The design keeps an eight-core i7 running at full speed without throttling, so performance remains consistent across long rendering or compilation sessions.

Memory capacity ceiling

Four DDR4 slots support dual-channel kits up to 64 GB at 2666, 2400 or 2133 MHz. This limit decides whether the board fits a workstation build that needs large memory or a mainstream gaming rig that stays at 32 GB.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $66.99
Cheaper than about 72% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameMSI
Product lineARSENAL GAMING
Model nameB360M MORTAR
Processor
ProcessorSupports 9th/8th Gen Intel Core / Pentium Gold / Celeron processors for LGA 1151 socket* Not backward compatible with older generation of LGA 1151 CPUs
CPU socketLGA 1151 (300 Series)
ChipsetIntel B360
Memory
Memory slot count4 × 288pin (DDR4)
Supported memorySupports DDR4 2666/ 2400/ 2133 MHz* Please refer to www.msi.com for more information on compatible memory MB_Maximum Memory Supported: 64 GB
Max supported RAM64 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots2 x M.2 slots (Key M)M2_1 supports up to PCIe 3.0 x4 and SATA 6Gb/s, 2242/2260/2280/22110 storage devices*M2_2 supports up to PCIe 3.0 x4, 2242/2260/2280 storage devices*** SATA2 port will be unavailable when installing SATA M.2 SSD in M2_1 slot.** M2_2 slot will be unavailable when installing a PCIe device in PCI_E4 slot.
Optane memory supportSupported on M2_2* Before using Intel Optane memory modules, please ensure that you have updated the drivers and BIOS to the latest version from MSI website.
Graphics
Onboard video chipSupported only by CPU with integrated graphic:1 x DVI-D port, supports a maximum resolution of 1920 × 1200@60Hz1 x DisplayPort, supports a maximum resolution of 4096 × 2304@60Hz1 x HDMI port, supports a maximum resolution of 4096 × 2160@30 Hz* No Display support when using the Processor model with suffix "F"
Audio & video
Audio chipDual Realtek ALC892
Sound channels7.1-Channel High Definition AudioSupports S/PDIF output
Connectivity
Ethernet controllerIntel I219-V
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots2 x PCIe 3.0 x16 slots (support x16/x4 modes)
PCIe x1 slots2 x PCIe 3.0 x1 slots
Onboard USB headers1 x USB 3.1 Gen2 Type-C port1 x USB 3.1 Gen1 connector (supports additional 2 USB 3.1 Gen1 ports)1 x USB 2.0 connector (supports additional 2 USB 2.0 ports)
Power
Power connectors1 × 24-pin ATX main power connector1 × 8-pin ATX 12 V power connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
More details
LightingRGB

Questions about this item

How much heat does the extended heatsink design handle when an i7 runs all day?

The board uses extended PWM and enhanced circuit design so even a high-end i7 can run at full speed while the extended heatsinks keep temperatures lower.

Which memory kits must I already own to populate the four 288-pin slots?

You need DDR4 modules rated for 2666, 2400 or 2133 MHz; the board supports up to 64 GB in dual-channel mode.

Will my existing SATA 6Gb/s drives work alongside the two M.2 slots?

Yes, four SATA 6Gb/s ports are available, though SATA2 becomes unavailable when an M.2 device is installed in the M2_1 slot.

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