Asus PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire

MX74318 PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire
MX74318 PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire MX74318 PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire MX74318 PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire MX74318 PRIME Z370-A II ATX w/ DDR4 2133, 7.1 Audio, Gigabit LAN, SLI / 3-Way CrossFire

Product Info

ASUS PRIME Z370-A: For 8th Gen Intel® Core™ Coffee Lake


Stronger Than Steel


This ASUS PRIME Z370-A Motherboard is ready to use one or two Video Cards (in SLI or CrossFire configurations) to push your 3D Graphics farther than ever!

With modern video cards you can enjoy your Gaming at higher resolutions and higher frame rates than before. Consider moving to 4K UHD Gaming, Ultra Wide Monitors and / or VR Headsets to take advantage of your new gaming rig's potential.

Prime Time
ASUS Prime Z370 Series motherboards provide the solid foundation needed for your first build, plus loads of scope to grow with your ambitions.

We've melded all the good stuff that's packed into the latest Intel processors with essential ASUS design and engineering, so you benefit from industry-leading technologies — including automated system tuning, comprehensive cooling controls, immersive onboard audio, and support for the ASUS Fan Extension Card. Build smart and easy with ASUS Prime Z370.

Take Advantage of the Power of Intel® 8th Gen Coffee Lake CPUs


ASUS Motherboards Are Your Tactical Advantage
This ASUS PRIME Z370-A Motherboard along with a compatible Intel® 8th Gen Coffee Lake Processor goes farther, faster than previous Consumer level Intel® CPUs and Chipsets ever have. The latest 8th Gen Intel Coffee Lake Processors for the Z370 Chipset come with enhanced clock rates, improved memory caching and higher "per core" IPC scores to give you the best possible performances.

ASUS Z370 Motherboards: Your Tactical Advantage
This ASUS Motherboard has Dual PCIe 3.0 x16 video card slots with room for two modern high end Video Cards in x8/x8 configurations. It is backed up by many other advanced performance features and faster connectivity options like NVMe M.2 PCIe 3.0 x4 slot technology. Get ready for incredible Gaming and Workstation performance beyond your wildest dreams!


  • Compatible with Intel® 8th Gen Core™ processors to maximize connectivity and speed with Dual M.2, USB 3.1 Gen2, and Intel® Optane™ Memory compatibility
  • 5-Way Optimization with Auto-Tuning and FanXpert 4
    automatically tailors overclocking profiles to your unique build for maximum OC performance and dynamic system cooling
  • Unmatched personalization with ASUS exclusive Aura Sync RGB lighting
    with additional RGB header and 3D-printing mounts other Motherboards do not have
  • Two Patent Pending SafeSlots
    feature an injection molding process that integrates metal framing for a stronger, firmly anchored PCIe slot built for heavyweight GPUs
  • Industry Leading 8 Channel HD Audio
    enhanced by ASUS exclusive Realtek S1220A featuring Crystal Sound 3 and driven by Japanese capacitors for warm, immersive sound

Power Delivery Enhancements

The Prime Z370-A II's CPU VRM utilizes Dr. MOS power stages that combine high-side and low-side MOSFETs and drivers into a single package, delivering the power and efficiency that Intel's latest processors demand.

ProCool power connector
Compared with traditional power inputs, ProCool sockets are built to tight specifications to ensure flush contact with the PSU power lines. This lowers impedance, which helps to prevent hotspots and connector failure.

Tune It Your Way

5-Way Optimization
ASUS 5-Way Optimization makes your PC smart. One click takes care of complex tuning, dynamically optimizing essential aspects of the system to provide overclocking and cooling profiles that are tailored for your rig.

  • An automated tuning utility that optimizes overclocking and cooling profiles for your unique system configuration
  • Fans stay whisper-quiet with everyday computing, and deliver optimal airflow when the system is crunching through CPU or GPU-intensive tasks
  • Stress test function helps optimize and overclock for CPU or memory centric workloads

Make Your Memory Go Faster

ASUS OptiMem preserves memory signal integrity by routing memory traces and vias to the optimal PCB layer, and T-Topology layout ensures time-aligned signaling by balancing trace lengths between memory slots. These enhancements lead to more headroom for overclocking and improved stability, allowing memory speeds of DDR4-4000 and beyond with all slots populated.

OC Design – ASUS Pro Clock Technology
PRIME Z370-A II includes a dedicated base-clock (BCLK) generator that extends CPU and memory overclocking margins. This custom solution works in tandem with the TPU to enhance voltage and BCLK overclocking control, providing the flexibility to extract every ounce of performance from the Intel Core 8th Generation processors.

Cooler By Design
PRIME Z370-A II features the most comprehensive cooling controls ever, configurable via Fan Xpert 4 or the UEFI BIOS.

  • Multiple temperature sources
  • AIO Pump
  • 4-pin PWM/DC fan
  • ASUS Fan Extension Card support
  • Smart Protection

ASUS Fan Holder
With the all-new ASUS Fan Holder increasing airflow your Prime Z370 Series motherboard's VRM area is simple. Just screw on a 40/50mm fan, mount the bracket on the heatsink, and hook the fan up to a header for a targeted cooling boost. With the Fan Holder and fan in place, VRM temperatures are reduced by up to 25° C; perfect for your overclocking adventures.

Media-acclaimed UEFI BIOS
The smoothest, slickest mouse-controllable graphical BIOS has been improved to make it even more appealing. Whether you're a PC novice or a seasoned overclocker, EZ and Advanced modes will help you quickly find your way, quickly and easily.

  • EZ Tuning Wizard
    Quickly apply a CPU overclock to improve system performance, or configure a RAID array for faster data retrieval and backups
  • My Favorites
    Quickly discover tuning options and add preferred tools to the list

EZ Mode:

  • Intuitive graphical fan control:
    Fine-tune individual fans simply by dragging a curve with the mouse
  • EZ XMP:
    Improve your DRAM performance with a click
  • SATA Information:
    Display SATA port details that help you easily recognize drives
  • Fast Clock Adjustment:
    Use mouse controls to change the time and date

Advanced Mode:

    View recommendations for multi-VGA configurations and detailed information for select ASUS graphics cards
  • Secure Erase:
    Restore your SSDs to factory-fresh condition
  • Last Modified Log:
    Track last change and save preferred profiles onto a USB drive
  • SATA Port Renaming:
    Rename SATA ports for easy identification

Ultra Fast Connectivity

M.2 Storage Slots: Speed up Dual M.2 Slots up to 32Gbps each
With x4 PCI Express 3.0/2.0 bandwidth, M.2 supports up to 32Gbps data-transfer speeds. It's the perfect choice for an operating system or application drive, providing fast access to data.

M.2 heatsink: Keep your M.2 SSDs cooler
Prime Z370-A has an ultra-efficient heatsink to reduce M.2 SSD temperatures by up to 20° C; and that means optimal storage performance and improved SSD longevity.

Intel® Optane™ Memory Ready

Intel® Optane™ is a revolutionary non-volatile memory technology supported by this Prime Z370-A II Motherboard. Intel Optane memory modules accelerate attached storage to reduce boot and load times, so everything feels faster and more responsive.

USB 3.1 Gen 2 Type-C & Type-A Ports
With backward-compatible reversible USB 3.1 Gen 2 Type-C and standard USB 3.1 Gen A Type-C ports, you'll experience ultimate connection flexibility and blazing data-transfer speeds of up to 10Gbps!

Intel® Ethernet Port: more throughput, less CPU usage
The ASUS Prime Z370-A II features the very latest Intel Ethernet. Intel's LAN has the advantage of reducing CPU overhead and offering exceptionally high TCP and UDP throughput for faster, smoother data transfer.

Reliable Stability and Compatibility

SafeSlot: Protecting your graphics card investment(s)
SafeSlot is the PCIe slot reinvented by ASUS and engineered to provide superior retention and shearing resistance. Manufactured in a single step using a new insert-molding process, SafeSlot integrates the slot with fortifying metal for an inherently stronger slot, which is then firmly anchored to the PCB through additional solder points.

Built to Last

ASUS is the world's foremost motherboard manufacturer, renowned for our unique Design Thinking approach. Our exhaustive testing exceeds industry standards, supported by high-quality components for exceptional real-world protection. ASUS motherboards are proven compatible with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation.

ASUS gives you the peace of mind of knowing that your motherboard is fit for all environments and applications. By choosing ASUS, you also gain the freedom to select outstanding component options, for trouble-free DIY experiences.

  • 5X Protection III: Hardware safeguards to ensure long-term durability
  • 520+ DDR4 compatibility: Industry-leading DDR4 memory compatibility for best flexibility and reassurance
  • 1000+ Compatible devices: Compatibility with a range of CPUs, memory modules, graphics cards and more
  • 8000+ Validation hours: Extensive testing with latest components for enhanced reliability, compatibility and safety

Upgraded To Unrivaled Audio

Realtek codec and unique design features for pristine, powerful audio
PRIME Z370-A II utilizes a unique audio codec designed in close collaboration with Realtek — the Realtek S1220A. It also features an unprecedented 120dB signal-to-noise ratio for the stereo line-out and a 113dB SNR for the line-in, providing pristine audio quality. Additionally, a new impedance-sensing circuit automatically adjusts gain to ensure the optimal volume range for your headphones.

DTS Headphone:X™ Surround Sound
Immersive 3D surround sound technology provides incredible audio experiences that leave the competition back in 2D space.

Crystal Sound 3

Flawless Audio That Immerses You In The Game

  • Power Pre-regulator
    Reduces power-input noise to ensure consistent performance
  • Audio Shielding
    Separates analog/digital signal domains, significantly reducing multi-lateral interference
  • Separate PCB Layer for Left and Right Audio Tracks
    Ensures minimal crosstalk between audio paths
  • Integrated Amplifier
    Capable of driving high-impedance headphones, without rolling-off high or low frequencies
  • De-pop Circuit
    Reduces start-up popping noise to all audio outputs
  • Premium Japanese Made Audio Capacitors
    Premium parts provide an immersive sound signature, with exceptional fidelity

Visual Beauty in Virtual Worlds

Aura Sync: Outshine the competition
A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura Sync offers full RGB control with a variety of functional presets for the built-in RGB LEDs as well as the LED strips connected to the onboard RGB headers.* And it can all be synced with an ever-growing portfolio of Aura-capable ASUS hardware.**
*The Aura RGB-strip header supports 5050 RGB LED strips with a max power rating of 3A @ 12Vdc, 36W. For maximum brightness, strip length should not exceed 3m.
** Optional LED Strips and Aura Compatible Devices sold separately.

12 RGB LED Lighting Modes:

  • Breathing
  • Colour Cycle
  • Comet
  • CPU Temperature
  • Flash & Dash
  • Glowing Yo Yo
  • Music Effect
  • Rainbow
  • Starry Night
  • Static
  • Strobing
  • Wave

Beyond VR ready: Complete Your Immersion

PRIME Z370-A II isn't just VR ready; it goes way beyond. The ASUS Beyond VR Ready marque means that PRIME Z370-A II has been tested with loads of class-leading components to ensure that your productivity, gaming and entertainment needs are tuned for maximum performance. ASUS Beyond VR Ready opens up a new way to configure and build your dream system with total confidence.

Intel® CPU and Chipset Features


The Intel® Z370 Chipset supports 8th Gen Intel® Core™ Processors
The Intel® Z370 is a single-chipset design that supports 8th Generation Intel® Core™ LGA1151 processors. It provides improved performance by utilizing serial point-to-point links, allowing increased bandwidth and stability. Additionally, the Z370 provides a maximum of 10 USB 3.1 Gen 1 ports, six SATA 6Gbps ports, and 32Gbps M.2 and PCIe 3.0 lane speed support, for faster data retrieval. Intel Z370 also supports integrated-graphics, so you'll enjoy the very latest in graphics performance.

Ready For 8th Gen Intel Core LGA1151 "Coffee Lake" Processors
This motherboard supports 8th Gen Intel® Core™ processors in the LGA1151 package, with integrated graphics, memory and PCI Express controllers to support onboard graphics output with dedicated chipsets, dual-channel (4-DIMM) DDR4 memory and 16 PCI Express 3.0/2.0 lanes for great performance.

Additional Information:

Visit the Manufacturer Web Page for Full Details

Download the Manufacturer Product Manual

I/O Ports



Intel® Processor Support:

This ASUS Motherboard supports select 8th Gen Intel® Core™ "Coffee Lake" Processors. Even though it is a LGA 1151 Socket, pin assignments have changed, making this Motherboard incompatible with earlier Generation Intel® Processors.

This Motherboard initially supports these Intel® Core™ processors, with more to follow:

  • i7-8700K
  • i7-8700
  • i5-8600K
  • i5-8400
  • i3-8350K
  • i3-8100

Visit the Manufacturer CPU Support Web Page

Operating System Support:

Requires Windows® 10, 64 bit


CPU Support Supports select 8th Gen Intel® Core™ i7, i5 and i3 processors in the LGA1151 package.

Even though it is a LGA 1151 Socket, pin assignments have changed, making this Motherboard incompatible with earlier 7th and 6th Gen Intel® Processors.

Chipset Intel® Z370 Chipset
Memory Runs up to 4x DIMM DDR4-2133 Stock Clocked Unbuffered RAM, 64GB Max (4x 16GB)

Supports Overclocked Ram up to DDR4-4000

Supports Intel® XMP Certified RAM
Dual Channel Memory Architecture Design
Integrated Graphics Requires Intel® Processor with Integrated Graphics Chip:
1x HDMI port, up to 4,096 x 2,160 @ 30Hz / 3,840 x 2,160 @ 60Hz
1x DVI-D port, up to 1,920 x 1,200 @ 60Hz
1x DisplayPort port, up to 4,096 x 2,304 @ 60Hz
This HDMI port supports HDCP 2.2
Uses up to 1GB of Shared RAM
Storage 6x SATA 6Gb/s connectors w/ RAID 0, 1, 5 & 10

1x M.2 NVMe 2280 PCIe x4 / SATA III SSD connector
(Socket 3, M key, type 2242/2260/2280/22110)
1x M.2 NVMe 2280 SATA and PCIe x4 SSD connector
(Socket 3, M key, type 2242/2260/2280 support)

All M.2 Slots support Intel® Optane™ Memory Ready
(Only 1x Optane™ Memory Card is supported at once)
Expansion Slots 2x PCIe 3.0 x16 slot, running at x16 or x8/x8
1x PCIe 3.0 x16 slot, running at x4
(Supports x16, x8/x8 or x8/x4/x4 Multiple GPU Modes)

4x PCIe 3.0 x1 slots

Multi-GPU Support Support for NVIDIA® 2-Way NVIDIA® SLI™ technologies
(Supports2-Way x8/x8 SLI™ Modes)

Support for AMD 2 or 3-Way AMD CrossFireX™ technologies
(Supports 2-Way x8/x8 or 3-Way x8/x4/x4 CrossFireX™ Modes)

USB Ports Rear I/O Panel Ports
1x USB 3.1 Gen 2 (10Gbps) Type-C port w/ 15W Charging
1x USB 3.1 Gen 2 (10Gbps) Type-A port w/ 15W Charging
2x USB 3.1 Gen 1 (5Gbps) Type-A ports
2x USB 2.0 (480Mbps) Type-A ports

2x USB 3.1 Gen 1 (5Gbps) connectors support up to 4x USB 3.1 Gen1 Type A ports
2x USB 2.0 (480Mbps) Connectors support up to 4x USB 2.0 Type A ports

LAN Intel® i219-V chipset:
1x Gigabit RJ45 LAN port
ASUS Turbo LAN Utility
Audio Realtek® S1220A 8-Channel High Definition Audio CODEC featuring Crystal Sound 3
Impedance sense for front and rear headphone outputs
Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
Supports Jack-detection, Multi-streaming & Front Panel MIC Jack-retasking
High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
Front panel audio connector (AAFP)
Supports up to 32-Bit/192kHz playback

Audio Features:
- DTS Headphone:X
- Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference
- Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals
- Premium Japanese-made audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity
- Unique de-pop circuit: Reduces start-up popping noise to audio outputs
- Power pre-regulator: Reduces power input noise to ensure consistent performance
- Separate layer for left and right track, ensuring both sound deliver equal quality

Back Panel I/O Ports 1x DVI-D port
1x HDMI v1.4b port
1x DislayPort v1.2 port
1x RJ-45 Gigabit Ethernet port
1x USB 3.1 Type-C Gen 2 port
1x USB 3.1 Type-A Gen 2 port
2x USB 3.1 Type-A Gen 1 ports
2x USB 2.0 Type-A ports
1x S/PDIF Optical Port
5x 3.5mm Audio Jacks
Internal I/O 1x Aura RGB Strip Header 2x USB 3.1 Gen 1 (5Gbps) connectors for us to 4x USB 3.1 Gen 1 ports
2x USB 2.0 (480Mbps) connectors for up to 4x USB 2.0 ports
1x M.2 Socket 3 with M Key, type 2242 / 2260 / 2280 / 22110 storage devices support (SATA / x4 PCIE modes)
1x M.2 Socket 3 with M Key, type 2242 / 2260 / 2280 storage devices support (PCIE mode only)
6x SATA 6Gb/s connectors
1x CPU Fan connector (1x 4-pin)
1x CPU OPT Fan connector (1x 4-pin)
2x Chassis Fan connector (2x 4-pin)
1x Thunderbolt header
1x 24-pin EATX Power connector
1x 8-pin ATX 12V Power connector
1x Front panel audio connector (AAFP)
1x System panel (Q-Connector) (Chassis intrusion header is inbuilt)
1x 5-pin EXT_FAN (Extension Fan) connector
1x MemOK! button
1x Power-on button
1x Clear CMOS jumper
1x 14-1 pin TPM connector
1x COM port header
1x T_Sensor Connector
1x AIO PUMP Header
1x M.2 Fan Header
Manageability WfM 2.0, DMI 3.0, WOL by PME, PXE
BIOS 128 Mb Flash ROM, UEFI AMI BIOS, PnP, WfM2.0, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 EZ Tuning Wizard, F6 Qfan Control, F3 My Favorites, Last Modified log, F12 PrintScreen, and ASUS DRAM SPD (Serial Presence Detect) memory information.
Operating System Requires Windows® 10, 64 bit
Form Factor ATX Form Factor: 305 x 244mm

Package Contents

  • 1x User Manual
  • 1x ASUS Q-Shield
  • 1x ASUS Fan Holder
  • 3x SATA 6Gb/s Cables
  • 1x M.2 Screw Package
  • 1x Support DVD
  • 1x SLI HB BRIDGE (2-WAY-M)
  • 1x Q-connector (1 in 1)