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ATX motherboard with grey steel armour and silver heatsinks

ASRock

ASRock Z390 STEEL LEGEND Intel motherboard

SKU CH-PQ4X-423S2

ATX board for 8th and 9th Gen Intel Core CPUs on LGA 1151 with DDR4 up to 4266 MT/s, dual x16 PCIe 3.0 slots, two Ultra M.2 sockets, six SATA 6.0 Gb/s ports and Realtek ALC1200 7.1 audio

  • ProcessorSupports 9th and 8th Gen Intel Core Processors (Socket 1151)
  • ChipsetIntel Z390
  • Form factorATX
  • CPU socketLGA 1151 (300 Series)
  • CPU technologiesTurbo Boost Technology 2.0
  • Onboard video chipSupports Intel UHD Graphics Built-in Visuals: Intel Quick Sy
  • Supports 9th and 8th Gen Intel Core processors via LGA 1151 socket
  • Dual-channel DDR4 memory up to 128 GB across four 288-pin slots
  • Two PCI Express 3.0 x16 slots plus three x1 slots for expansion cards
  • Two Ultra M.2 sockets with PCI Express Gen3 x4 and SATA 6.0 Gb/s support
  • Realtek ALC1200 audio codec delivering 7.1-channel sound

Z390 chipset for 8th and 9th Gen Intel Core

The ASRock Z390 STEEL LEGEND is an ATX motherboard built around the Intel Z390 chipset. It accepts 8th and 9th Generation Intel Core processors in the LGA 1151 socket. The board is not backward compatible with earlier LGA 1151 CPUs. It targets builders who need a full-size platform for these specific processor generations.

DDR4 memory limits and dual-channel operation

Four 288-pin slots support dual-channel DDR4 up to 128 GB total capacity. Validated speeds range from 2133 MT/s to 4266+(OC) MT/s including 2400, 2666, 2933, 3200, 3600, 3733, 3800, 3866, 4000 and 4133 MT/s. Only non-ECC un-buffered modules are supported. The operating system may reserve memory under 32-bit Windows.

PCIe 3.0 x4 M.2 slot for NVMe or SATA drives

The primary Ultra M.2 socket (M2_1) accepts M-key modules in 2230, 2242, 2260, 2280 and 22110 lengths. It runs at PCIe 3.0 x4 (32 Gb/s) for NVMe SSDs or at SATA 6.0 Gb/s for SATA M.2 drives. Installing a SATA-type M.2 device in M2_1 disables the SATA3_5 connector. This slot determines whether a high-speed NVMe boot drive can be used.

How it compares

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

Price $106.99
Pricier than about 55% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASRock
Model nameZ390 STEEL LEGEND
Processor
ProcessorSupports 9th and 8th Gen Intel Core Processors (Socket 1151)
* Not backward compatible with older generation of LGA 1151 CPUs
CPU socketLGA 1151 (300 Series)
ChipsetIntel Z390
CPU technologiesTurbo Boost Technology 2.0
Memory
Memory slot count4 × 288pin (DDR4)
Supported memorySupports DDR4 4266+(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3800(OC)/ 3733(OC)/ 3600(OC)/ 3200(OC)/ 2933(OC)/ 2800(OC)/ 2666/ 2400/ 2133 non-ECC, un-buffered memory
Memory channelsDual Channel
Storage
M.2 slots1 x Ultra M.2 Socket (M2_1), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
1 x Ultra M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
** Supports Intel Optane Technology
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit
Optane memory supportYes
SATA and RAID support0/1/5/10
Audio & video
Audio chipRealtek ALC1200
Sound channels7.1 Channels
Connectivity
Ethernet controllerIntel I219-V
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots2 x PCI Express 3.0 x16 Slots (PCIE1/PCIE4: single at x16 (PCIE1); dual at x16 (PCIE1) / x4 (PCIE4))*
* Supports NVMe SSD as boot disks
PCIe x1 slots3 x PCI Express 3.0 x1 Slots (Flexible PCIe)
Additional slots1 x M.2 Socket (Key E), supports type 2230 Wi-Fi/BT module and Intel CNVi (Integrated Wi-Fi/BT)
Rear panel ports1 x Antenna Bracket
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
1 x DisplayPort 1.2
1 x Optical SPDIF Out Port
2 x USB 2.0 Ports (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (ReDriver) (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (ReDriver) (Supports ESD Protection)
2 x USB 3.2 Gen1 Ports (Intel Z390) (Supports ESD Protection)
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)
Onboard USB headers2 x USB 2.0 Headers (Support 3 USB 2.0 ports) (Supports ESD Protection)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports) (Supports ESD Protection)
Power
Power connectors1 × 24-pin ATX Power Connector
1 × 8-pin 12 V Power Connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

Will my 7th generation Intel Core processor fit the LGA 1151 socket on this board?

No, the socket is for 300-series only and supports 8th and 9th generation Core CPUs. Older 6th and 7th generation LGA 1151 processors are not electrically compatible.

Can I run four sticks of DDR4 at 3200 MT/s without manual tuning?

The board lists 3200 as an overclocked speed. Running four modules at that frequency will usually require enabling the XMP profile in the BIOS and may need voltage adjustments.

If I install a SATA M.2 drive in the second M.2 slot, which SATA port becomes unusable?

Occupying M2_2 with a SATA-type M.2 device disables the SATA3_1 connector. The remaining five SATA3 ports stay active.

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