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ASUS PRIME Z390M-PLUS mATX motherboard black PCB silver heatsinks

ASUS

ASUS PRIME Z390M-PLUS mATX Gaming Intel motherboard OptiMem II DDR4 4266 Dual M.2 HDMI Optane

SKU CH-4B66-13Z7B

Socket 1151 mATX board with OptiMem II DDR4 4266 support, dual M.2 slots and Intel Optane memory ready

  • ProcessorCore i7 / i5 / i3 (8th Gen, LGA1151)
  • OptiMem II trace routing preserves signal integrity for higher DDR4 4266 overclocking headroom
  • Enhanced power solution with premium components delivers better power efficiency
  • Dual native M.2 slots with NVMe PCIe RAID support enable ultrafast storage speeds
  • Comprehensive Fan Xpert 4 and UEFI controls manage fans and AIO pumps for leading cooling options
  • 5X Protection III hardware safeguards provide all-round protection for system reliability

Built for 8th and 9th Gen Intel Core

The ASUS PRIME Z390M-PLUS is an mATX motherboard for Socket 1151 processors. It supports Core i7, i5, i3, Pentium Gold and Celeron CPUs. Dual-channel DDR4 memory runs up to 4266 MHz with OptiMem II trace routing for signal integrity. Dual M.2 slots provide fast storage expansion.

Thermals and power efficiency

Premium components in the power delivery system improve efficiency during normal operation. Fan Xpert 4 and UEFI BIOS give comprehensive control over system fans and AIO pump headers. The 5X Protection III hardware safeguards add multiple layers of circuit protection.

Sustained load behaviour

The enhanced power solution maintains stable delivery during extended workloads. OptiMem II layout preserves memory signal quality at high frequencies over long sessions. Chipset architecture provides 16 PCI Express 3.0/2.0 lanes and 32Gbps M.2 throughput for consistent data transfer.

How it compares

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

Price $70.99
Cheaper than about 68% of the 2,965 comparable items (median $97.99).

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Specifications

Processor
ProcessorCore i7 / i5 / i3 (8th Gen, LGA1151)

Questions about this item

How is the OptiMem II trace layout installed, and what step is often missed?

OptiMem II is a factory trace design, not a separate part. The step builders miss is seating all four DDR4 DIMMs fully until the retention clips click, ensuring the optimized signal path makes contact.

What maintenance or replacement will the 5X Protection III hardware safeguards need later?

The 5X Protection III safeguards are built into the board and need no scheduled replacement. Keep the UEFI BIOS updated and clean dust from fan headers so the Fan Xpert 4 cooling controls stay effective.

What limit appears first under sustained use with dual M.2 NVMe RAID?

The chipset provides 16 PCI Express 3.0 lanes total; running two M.2 NVMe drives in RAID plus a graphics card can saturate that lane budget, making bandwidth the first bottleneck.

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