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MSI MAG Z390M MORTAR micro-ATX motherboard in black with silver heatsinks

MSI

MSI MAG Z390M MORTAR Intel motherboard DDR4 128GB

SKU CH-8ZH4-Y4RSB

Micro-ATX Intel Z390 board for 8th and 9th Gen Core CPUs with dual-channel DDR4 up to 128 GB

  • Processor8th/9th Gen Intel Core ™/Pentium Gold and Celeron processors
  • ChipsetIntel Z390
  • CPU socketLGA 1151
  • Supported memorySupports dual-channel DDR4 4400 MHz memory
  • Max supported RAM128 GB
  • PCI slots2 PCIe 3.0 x16 slots (supports x16/x4 modes) 1 PCIe 3.0 x1 s
  • Supports 8th and 9th Gen Intel Core processors via LGA 1151 socket
  • Dual-channel DDR4 memory up to 4400 MHz and 128 GB capacity
  • Two PCIe 3.0 x16 slots plus one x1 slot for expansion cards
  • Intel I219-V Gigabit LAN with Realtek ALC892 7.1 channel audio
  • Micro ATX form factor measuring 23.6 by 20.0 cm

Z390 micro-ATX for 8th and 9th Gen Intel

The MSI MAG Z390M MORTAR uses the Intel Z390 chipset and an LGA 1151 socket to support 8th and 9th Generation Intel Core, Pentium Gold and Celeron processors in a compact micro-ATX form factor. Dual-channel DDR4 memory runs up to 4400MHz with a maximum capacity of 128GB. A single Intel I219-V Gigabit LAN controller handles wired networking.

Sustained load behaviour with extended heatsink

Extended heatsinks on the VRM and chipset increase surface area so heat dissipates steadily during long sessions rather than spiking in short bursts. The Realtek ALC892 codec delivers 7.1 channel audio with S/PDIF output that remains clean under continuous playback. Steel-armoured PCIe 3.0 x16 slots retain heavy graphics cards without flex that can stress solder joints over time.

Practical limits of the Z390 platform

The board provides three M.2 interfaces and four SATA III ports for storage, though the single E-key M.2 slot accepts only Intel CNVi wireless modules. Rear I/O includes one USB 3.1 Gen2 Type-C, one USB 3.1 Gen2 Type-A and two USB 3.1 Gen1 ports, while an internal USB 3.1 Gen2 Type-C header adds front-panel connectivity. PCIe 3.0 x16 slots operate in x16 or x4 modes depending on population.

How it compares

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

Price $98.99
Typical for this category: the median of 2,965 items is $97.99.

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Specifications

Product
Brand nameMSI
Product lineMSI MAG Z390M MORTAR
Model nameMSI MAG Z390M MORTAR
Processor
Processor8th/9th Gen Intel Core ™/Pentium Gold and Celeron processors with LGA1151 pin support
CPU socketLGA 1151
ChipsetIntel Z390
Memory
Supported memorySupports dual-channel DDR4 4400 MHz memory
Max supported RAM128 GB
Storage
SATA and RAID support3xM.2 interface, 4xSATA III interface
Audio & video
Audio chipRealtek ALC892 decoding chip
7.1 channel high-quality sound effects
Supports S/PDIF output
Connectivity
Ethernet controller1 Intel I219-V Gigabit network interface card
Ports & slots
PCI slots2 PCIe 3.0 x16 slots (supports x16/x4 modes)
1 PCIe 3.0 x1 slot
1 M.2 slot (E key) for installing Intel CNVi wireless modules only

Questions about this item

How hot and loud does the Z390 chipset and VRM area run when the board powers a 9th Gen Intel Core processor all day?

The Z390 chipset and VRM heatsinks are passively cooled, so noise stays at zero; sustained loads will raise their temperature but the board has no active fan to create sound.

Which DDR4 memory kit must I already own to reach the advertised 128 GB capacity?

You need four DDR4 DIMMs rated up to 4400 MHz; the board runs dual-channel and supports a maximum of 128 GB across its four slots.

Will my existing SATA SSDs and Intel CNVi wireless module plug straight into this Micro-ATX board?

Yes — four SATA III ports and one M.2 E-key slot accept standard SATA drives and Intel CNVi Wi-Fi cards respectively.

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