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Black extended ATX motherboard with two DDR4 slots and metallic heatsinks

ASUS

ASUS ROG MAXIMUS IX APEX Z270 Intel motherboard

SKU CH-BA74-79YKG

Extended ATX Z270 motherboard for 6th and 7th generation Intel Core processors, dual DDR4 slots up to 4266 MHz overclocked, single PCIe 3.0 x16 and dual PCIe 3.0 x4 slots.

  • ProcessorIntel for 7th/6th Generation Core i7/i5/i3/ Pentium/Celeron
  • ChipsetIntel Z270
  • Form factorExtended ATX
  • CPU socketLGA 1151
  • CPU technologiesTurbo Boost Technology 2.0 The Intel Turbo Boost Technology
  • Onboard video chipIntegrated Graphics Processor - Intel HD Graphics supportMul
  • Supports 7th and 6th Gen Intel Core processors via LGA 1151 socket
  • DDR4 memory overclocking up to 4266 MT/s on two 288-pin slots
  • Intel Z270 chipset enables CPU Turbo Boost 2.0 and RAID 0/1/5/10 on four SATA ports
  • SupremeFX S1220A audio codec delivers 8-channel high-definition sound
  • HDMI output up to 4096 x 2304 at 60 Hz and DisplayPort up to 4096 x 2160

LGA 1151 Z270 ROG Motherboard

The ASUS ROG MAXIMUS IX APEX is an Extended ATX motherboard built for Intel 6th and 7th Generation Core i7, i5, i3, Pentium and Celeron processors. It uses the Intel Z270 chipset and the LGA 1151 socket. It is not compatible with Intel 8th Generation CPUs. The board targets enthusiasts who want high memory speeds and a focused feature set.

Dual Channel DDR4 Memory Limit

The board provides two 288-pin DDR4 slots with a maximum capacity of 32 GB. Supported overclocked speeds range from 2133 up to 4266 MT/s, though Hyper DIMM support depends on the specific CPU installed. This two-slot layout is optimised for high-frequency dual-channel kits rather than large memory arrays.

Graphics and Storage Headroom

Integrated Intel HD Graphics can drive HDMI at 4096 x 2304 at 60 Hz and DisplayPort at 4096 x 2160. Four SATA 6 Gb/s ports support RAID 0, 1, 5 and 10 for redundant or fast storage arrays. Expansion includes one PCIe 3.0 x16 slot, one PCIe 3.0 x8 slot, two PCIe 3.0 x4 slots and two PCIe 3.0 x1 slots for add-in cards.

How it compares

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

Price $125.99
Pricier than about 63% of the 2,965 comparable items (median $97.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Product lineROG
Model nameMAXIMUS IX APEX
Processor
ProcessorIntel for 7th/6th Generation Core i7/i5/i3/ Pentium/Celeron Processors* Not Compatible with Intel 8th Gen CPUs
CPU socketLGA 1151
ChipsetIntel Z270
CPU technologiesTurbo Boost Technology 2.0 The Intel Turbo Boost Technology 2.0 support depends on the CPU types.
Memory
Memory slot count2 × 288pin (DDR4)
Supported memoryDDR4 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3800(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3500(O.C.)/ 3466(O.C.)/ 3400(O.C.)/ 3333(O.C.)/ 3300(O.C.)/ 3200(O.C.)/ 3000(O.C.)/ 2800(O.C.)/ 2666(O.C.)/ 2400(O.C.)/ 2133* Hyper DIMM support is subject to the physical characteristics of individual CPUs.
Max supported RAM32 GB
Storage
SATA ports4 x SATA 6Gb/s
SATA and RAID support0/1/5/10
Audio & video
Audio chipROG SupremeFX High Definition Audio CODEC S1220A
Sound channels8 Channels
Connectivity
Ethernet controllerIntel I219-V
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots1 x PCIe 3.0/2.0 x16
PCIe x4 slots2 x PCIe 3.0 x4
PCIe x1 slots2 x PCIe 3.0/2.0 x1
PS/2 ports1 x PS/2 keyboard (purple)1 x PS/2 mouse (green)
HDMI ports1 x HDMI
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports2 x USB 3.1 Gen 2 Type-A + USB Type-C6 x USB 3.1 Gen 1
S/PDIF output1 x Optical
Audio jacks5 x Gold-plated audio jacks
Onboard USB headers1 x USB 3.1 Gen 1 connector(s) support(s) additional 2 USB 3.1 Gen 1 port(s)3 x USB 2.0 connector(s) support(s) additional 6 USB 2.0 port(s)
Power
Power connectors1 × 24-pin EATX Power connector(s)2 × 8-pin ATX 12 V Power connector(s)
Size & build
Form factorExtended ATX
Width and length12.0 in × 10.7 in
In the box
In the boxAccessories:User's manualI/O Shield4 x SATA 6Gb/s cable(s)1 x M.2 Screw Package1 x Supporting DVD1 x SLI HB BRIDGE (2-WAY-L)1 x Q-Connector1 × 10-in-1 ROG cable label1 x DIMM.2 extension card with 2 x M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x4 mode)1 × 3D printing mount package1 x ROG coasters
More details
PCI express x81 x PCIe 3.0/2.0 x8
LightingRGB

Questions about this item

How does the DDR4 4266(O.C.) headline speed translate once the board is in a working system?

The 4266 MT/s figure is an overclocked target that depends on the installed CPU's memory controller and the physical DIMM characteristics. With two 288-pin slots the board tops out at 32 GB, so real-world stability will vary by processor and memory kit quality.

What does the single PCIe 3.0 x16 slot cap in practice for a graphics card?

The primary slot runs at PCIe 3.0 x16 electrical, delivering full bandwidth to one GPU. A second x8 slot and two x4 slots share the remaining chipset lanes, so multi-GPU or add-in cards will negotiate lower widths.

What clearance and mounting points does the Extended ATX form factor need in a case?

The board follows the Extended ATX footprint, so the case must support E-ATX dimensions and provide the standard ATX standoff pattern. Two 288-pin DDR4 slots sit along the top edge, and the I/O shield includes HDMI and DisplayPort cutouts.

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