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ATX motherboard with black metal armour and integrated water block

ASUS

ASUS ROG Maximus XI Formula Intel Z390 motherboard

SKU CH-C4QM-21SPB

Supports LGA 1151 CPUs on Intel Z390 with DDR4 memory up to 128 GB in ATX form factor

  • CPU Socket TypeLGA 1151
  • ChipsetIntel Z390
  • Maximum Memory Supported128GB
  • Supports up to 128GB DDR4 for heavy multitasking
  • Intel Z390 chipset enables modern platform features
  • LGA 1151 socket fits compatible 8th and 9th Gen CPUs
  • ATX form factor suits standard full-size cases
  • Includes SATA cable and I/O shield for basic setup

Socket and Chipset

The ASUS ROG Maximus XI Formula is an ATX motherboard built around the Intel Z390 chipset and LGA 1151 socket. It is intended for enthusiasts assembling a high-performance desktop with compatible 8th or 9th generation Intel Core processors. The board supports dual-channel DDR4 memory up to 128GB total capacity.

Memory Capacity Decides Fit

The single specification that determines whether this is the right part is the 128GB maximum memory limit across four DDR4 slots. If your build requires more than 128GB of system memory, this motherboard cannot accommodate it and a different platform must be chosen.

Installation Notes

The package includes the motherboard, a single SATA cable and a chassis I/O back panel with no original box or additional accessories. Installation follows standard ATX mounting procedures, but buyers should verify CPU cooler clearance against the VRM heatsink layout before purchase.

Highlights

  • Supports up to 128GB DDR4 for heavy multitasking
  • Intel Z390 chipset enables modern platform features
  • LGA 1151 socket fits compatible 8th and 9th Gen CPUs
  • ATX form factor suits standard full-size cases
  • Includes SATA cable and I/O shield for basic setup

Specifications

BrandASUS
ModelASUS ROG Maximus XI Formula
CPU Socket TypeLGA 1151
ChipsetIntel Z390
Maximum Memory Supported128GB

Questions about this item

What does the 128 GB maximum memory mean for my build?

You can install up to 128 GB of DDR4 on this board, giving headroom for heavy multitasking or content-creation workloads.

How does the Z390 chipset limit the SATA ports I can use?

The Intel Z390 chipset provides a fixed number of native SATA lanes, so the total SATA devices you can connect is capped by that controller.

Will this ATX board fit in my case and align with the I/O shield?

The board follows the standard ATX form factor and includes a chassis I/O back panel, so it mounts in any ATX-compatible case using the regular standoff pattern.

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