ASUS PRIME X299-A II Intel Socket LGA 2066 Motherboard

Brand : Asus
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    • Intel LGA 2066 socket: Ready for the latest Intel® Core™ X-series processors
    • AI Overclocking: Quickly optimizes your CPU performance based on the CPU and cooler, achieving results that are extremely close to manual tuning by experts
    • Robust power design: 12 IR3555 power stages, ProCool II connectors, alloy chokes and ultra-durable capacitors for stable power delivery
    • M.2 heatsink: Ultra-efficient heatsink reduces M.2 SSD temperatures by up to 20° C for unthrottled transfer speeds and enhanced reliability
    • Next-gen connectivity: Intel Optane memory ready, Intel® VROC support, dual M.2 support, and USB 3.2 Gen Type-C™

    ASUS PRIME X299-A II Intel Socket LGA 2066 Motherboard

    The Prime X299-A II caters to users with serious pursuits: Those who prefer to put their high-core-count processors to more productive use. This high-end desktop board combines cutting-edge performance with our signature features, including an enhanced VRM tailored for running the CPU performance at stock speeds, intuitive cooling control, next-gen connectivity, and extensive customization.

    Get the most out of all your cores

    Intel®'s high-end desktop platform raises the stakes with updated Intel Core™ X-Series Processors that boast cores, cache, and bandwidth. The Prime X299-A II is ready for the additional processing power that plows through CPU-intensive tasks, and the extra bandwidth allows you to add more GPUs and NVMe SSDs to accelerate a wide range of work.

    Aura Sync - Outshine the competition

    A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura offers full RGB lighting control with a variety of functional presets for the built-in RGB LEDs and they can all be synced with an ever-growing portfolio of Aura-capable ASUS hardware. The board has dual headers for standard 4-pin RGB strips*, plus two more for the new Addressable Gen 2 RGB strips** and devices.

    Robust Power Design

    The LGA 2066 socket is compatible with Intel Core X-Series Processors with up to 18 cores, over 44 PCI Express® lanes, and 165-watt thermal design power (TDP). Those specs require serious power, so the Prime X299-A II is equipped with an enhanced power solution that includes 12 power stages that line up neatly along the top edge of the PCB.

    ProCool II connector

    ProCool II connectors ensure a snug and reliable connection to the EPS 12V power lines. The second-generation features upgrades of metal amour and solid pins for better heat dissipation, as well as a warning LED-display with a BIOS POST message to indicate an improper connection.

    PowIRstage MOSFETS

    Prime X299-A II VRM is comprised of 12 IR3555 PowIRstages®, each rated to handle 60 amps

    Microfine Alloy choke

    Each PowIRstage is accompanied by a high-permeability alloy-core choke rated to handle 45 amps.

    Multi-GPU support

    Fully loaded takes on a new meaning when you have over 44 PCI Express lanes stemming from the CPU. Those lanes can be split in an x16/x16/x8 configuration spanning the board's trio of PCIe x16 slots, allowing you to load up on GPUs to accelerate an increasingly diverse array of work.

    Achieve speed with onboard M.2

    Professional applications require fast solid-state storage, which is why the Prime X299-A II is equipped with three M.2 slots that are compatible with the latest NVMe SSDs. All slots support longer 110 mm drives, and they can be configured into bootable RAID arrays connected directly to the CPU via Intel VROC technology.

    Upgrade your RAID

    Use onboard M.2 slots and ASUS Hyper M.2 x16 Card V2* to take advantage of Intel's Virtual RAID on CPU (VROC)** by connecting the three M.2 drives in RAID configurations. With VROC, your RAID arrays are easily configured to be bootable, and traditional DMI bottlenecks are eliminated so that your storage is not held back by other traffic.

    USB 3.2 Gen 2 front-panel connector

    Future-proof connectivity

    Plenty of USB ports are provided to support high-end rigs loaded with peripherals, including a front-panel header with faster USB 3.2 Gen 2 connectivity for compatible cases.

    Intel Ethernet

    More throughput, less CPU usage and great gaming experiences

    The latest Intel I219-V Ethernet has the advantage of reducing CPU overhead and offering exceptionally high TCP and UDP throughput for faster, smoother data transfer.

    Cool to the core

    Effective cooling is extremely important, even at stock speeds. That is why the Prime X299-A II allows consolidated cooling control of the entire system, even for the most hardcore rigs. It comes equipped with onboard heatsinks, an array of fan headers, and options for water pump or AIO headers.

    M.2 Heatsinks

    Two M.2 slots are covered by heatsinks to combat temperature-induced throttling that can affect performance during heavy, sustained storage loads.


    A reinforced backplate improves the stability of the board, and the included thermal pad efficiently directs heat away from the VRM and other components.

    Cooler by design

    Prime X299-A II features the most comprehensive cooling controls ever, configurable via FanXpert 4 or the UEFI BIOS.

    Each header can dynamically reference three thermal sensors, and via Fan Xpert 4 you can even map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

    Tune it your way

    Comprehensive controls form the foundation of the ASUS Prime series. The Prime X299-A II packs flexible tools to tune every aspect of your system to deliver the performance that you desire.

    5-way Optimization

    One click takes care of all that complex tuning. ASUS 5-Way Optimization makes your PC smart. It dynamically optimizes essential aspects of the system, providing 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 quiet as a whisper for everyday computing, and deliver optimal airflow when the system is crunching through CPU or GPU-intensive tasks.

    All-new stress test that allows users to optimize and overclock for CPU or memory-centric workloads.


    The renowned UEFI BIOS provides everything you need to configure, tweak, and tune your rig. It offers intelligently simplified options for newcomers to PC DIY, as well as comprehensive features for seasoned veterans.

    Advanced tuning for serious tweaker

    When you're ready for a deeper dive into the configuration of your system, delve into the UEFI's Advanced mode and take complete control. Each section is intuitively organized, and a built-in search feature makes it easy to find the options you need. Advanced functions are coded with the intelligence to adapt to your settings, and when you're ready to take charge, parameters have the granularity to dial in performance just the way you want.

    Breeze setup with ease

    Designed to simplify setup, EZ mode presents all the vital settings and stats on one single page. With guided wizards, drag-and-drop functionality, and one-click application of important settings, your rig will be up and running in no time.

    Little things make a big difference

    We pay careful attention to all the little details that improve your overall experience, from integrating a flashing utility directly into the UEFI to simplifying firmware updates or displaying your system vital signs. Prime X299-A II provides the tools you need to personalize your build and stay on top of things.



    • Intel® Socket 2066 Core™ X-Series Processors
    • * The Intel® Turbo Boost Max Technology 3.0 support depends on the CPU types
    • * Refer to for CPU support list
    • Chipset : Intel® X299


    • (Intel® Core™ i9 10000 X-Series CPU)
    • 8 x DIMM, Max. 256GB, DDR4 4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3800(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2933/2800/2666/2400/2133 MHz Non-ECC, Un-buffered Memory
    • (Intel® Core™ i9 9000/7000 and i7 9000 X-Series CPU)
    • 8 x DIMM, Max. 256GB, DDR4 4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3800(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2933(O.C.)/2800(O.C.)/2666/2400/2133 MHz Non-ECC, Un-buffered Memory
    • Supports Intel® Extreme Memory Profile (XMP)
    • * Hyper DIMM support is subject to the physical characteristics of individual CPUs. 
    • * Refer to for the Memory QVL (Qualified Vendors Lists).

    Multi-GPU Support

    • Supports NVIDIA® Quad-GPU SLI® Technology
    • Supports NVIDIA® 3-Way SLI® Technology
    • Supports NVIDIA® 2-Way SLI® Technology
    • Supports AMD Quad-GPU CrossFireX™ Technology
    • Supports AMD 3-Way CrossFireX™ Technology

    Expansion Slots

    • 48-Lane CPU-
    • 3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
    • 2 x PCIe 3.0/2.0 x1 *1
    • 44-Lane CPU-
    • 3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
    • 2 x PCIe 3.0/2.0 x1 *1
    • 28-Lane CPU-
    • 2 x PCIe 3.0/2.0 x16 (x16, x16/x8) *2
    • 2 x PCIe 3.0/2.0 x1 *1
    • 1 x M.2 Socket 1 with E key, type 2230 for WIFI/BT devices support PCIE/USB mode*
    • * The Wi-Fi E key shares bandwidth with PCIEX1_1.
    • * The Wi-Fi/BT module is purchased separately


    • Intel® X299 Chipset :
    • 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)*3
    • 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)*4
    • 8 x SATA 6Gb/s port(s)*5
    • Support Raid 0, 1, 5, 10
    • Intel® Rapid Storage Technology supports
    • (Intel® Core™ i9 10000 X-Series CPU) :
    • 2 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)
    • Support Raid 0, 1, 5, 10
    • Intel® Rapid Storage Technology Enterprise supports
    • (Intel® Core™ i9 9000/7000 and i7 9000 X-Series CPU) :
    • 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)
    • Support Raid 0, 1, 5, 10
    • Intel® Rapid Storage Technology 15 support
    • Intel® Optane™ Memory Ready *6


    • Intel® I219V, 1 x Gigabit LAN
    • ASUS Turbo LAN Utility
    • ASUS LAN Guard
    • Realtek® S1220A 8-Channel High Definition Audio CODEC
    • - Power pre-regulator reduces power input noise to ensure consistent performance
    • - 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 Jack-retasking
    • Audio Feature :
    • - DTS X®:Ultra
    • - Optical S/PDIF out port(s) at back panel
    • - 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

    USB Ports

    • ASMedia® USB 3.2 Gen 2 controller : *1
    • 1 x USB 3.2 Gen 2 front panel connector port(s)
    • ASMedia® USB 3.2 Gen 2 controller : *1
    • 2 x USB 3.2 Gen 2 (up to 10Gbps) port(s) (2 at back panel, , Type-A + USB Type-CTM)
    • Intel® X299 Chipset :
    • 8 x USB 3.2 Gen 1 port(s) (4 at back panel, , 4 at mid-board)
    • Intel® X299 Chipset :
    • 6 x USB 2.0 port(s) (2 at back panel, , 4 at mid-board)
    Special Features
    • OC Design - ASUS PRO Clock II Technology
    • 5-Way Optimization by Dual Intelligent Processors 5
    • - 5-Way Optimization tuning key perfectly consolidates TPU, EPU, DIGI+ VRM, Fan Xpert 4, and Turbo Core App
    • AI Overclocking
    • ASUS 5X Protection III :
    • - ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
    • - ASUS LANGuard: Protects against LAN surges, lightning strikes and static-electricity discharges!
    • - ASUS Overvoltage Protection: World-class circuit-protecting power design
    • - ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
    • - ASUS Enhanced DRAM Overcurrent Protection - Short circuit damage prevention
    • - ASUS ESD Guards - Enhanced ESD protection
    • ASUS SafeSlot - Protect your graphics card Investment
    • AURA :
    • - Aura RGB Strip Headers
    • - Aura Lighting Effects Synchronization with compatible ASUS ROG devices
    • - Addressable Gen 2 Header
    • ASUS Exclusive Features :
    • - USB BIOS FlashBack™
    • - AI Suite 3
    • - Ai Charger
    • - Onboard Button : Power
    • - ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
    • - ASUS CrashFree BIOS 3
    • - Turbo LAN
    • - Armoury Crate
    • - Pre-mounted I/O Shield
    • - ASUS NODE: hardware control interface
    • - BIOS FlashBack™ Button
    • ASUS Quiet Thermal Solution :
    • - Stylish Fanless Design with M.2 Heat-sink solution
    • - ASUS Fan Xpert 4
    • ASUS Q-Design :
    • - ASUS Q-Code
    • - ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED, HDD LED)
    • - ASUS Q-Slot
    • - ASUS Q-DIMM
    • - ASUS Q-Connector
    • Intel® Virtual RAID on CPU (VROC) ready
    • DIY Friendly Design
    • - ProCool II
    • - SafeSlot

    Back I/O Ports

    • 1 x PS/2 keyboard/mouse combo port(s)
    • 1 x LAN (RJ45) port(s)
    • 4 x USB 3.2 Gen 1
    • 2 x USB 2.0 (one port can be switched to USB BIOS FlashBack™)
    • 1 x Optical S/PDIF out
    • 5 x Audio jack(s)
    • 1 x USB BIOS FlashBack™ Button(s)
    • 2 x USB 3.2 Gen 2 (up to 10Gbps) ports (Type-A + USB Type-CTM)

    Internal I/O Ports

    • 1 x AAFP connector
    • 2 x Aura RGB Strip Headers
    • 1 x Addressable Gen 2 header(s)
    • 1 x USB 3.2 Gen 1 front panel TypeC™ connector
    • 2 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 4 USB 3.2 Gen 1 port(s)
    • 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
    • 1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
    • 2 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)
    • 1 x COM port(s) connector(s)
    • 8 x SATA 6Gb/s connector(s)
    • 1 x M.2_FAN connector
    • 1 x VROC_HW_Key
    • 1 x CPU Fan connector(s)
    • 1 x CPU OPT Fan connector(s)
    • 2 x Chassis Fan connector(s)
    • 1 x W_PUMP+ connector
    • 1 x AIO_PUMP connector
    • 1 x Thunderbolt header (5-pin) for ASUS ThunderboltEX series support
    • 1 x 24-pin EATX Power connector(s)
    • 2 x 8-pin EATX 12V Power connectors
    • 1 x Front panel audio connector(s) (AAFP)
    • 1 x System panel(s) (Q-Connector) (Chassis intrusion header is inbuilt)
    • 1 x Thermal sensor connector(s)
    • 1 x Power-on button(s)
    • 1 x Clear CMOS jumper(s)
    • 1 x Node Connector(s)
    • 1 x CPU_OV jumper
    • 1 x Q-Code


    • User´s manual
    • 1 x Vertical M.2 bracket set
    • 1 x ASUS Fan Holder
    • 4 x SATA 6Gb/s cable(s)
    • 2 x M.2 Screw Package
    • 1 x Supporting DVD
    • 1 x Q-Connector
    • 1 x Extension Cable for RGB strips (80 cm)
    • 1 x Extension cable for Addressable LED


    • 128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 AI OC Guide, F6 Qfan Control, F3 My Favorites, Last Modified log, F9 Search, F12 PrintScreen, F4 AURA ON/OFF and ASUS DRAM SPD (Serial Presence Detect) memory information
    • Manageability : WfM 2.0, DMI 3.0, WOL by PME, PXE

    Support Disc

    • Drivers
    • ASUS Utilities
    • EZ Update
    • Anti-virus software (OEM version)
    Operating System : Windows® 10 64-bit

    Form Factor

    • ATX Form Factor
    • 12  inch x 9.6  inch ( 30.5  cm x 24.4  cm )


    • * 1. PCIEX1_1 shares bandwidth with Wi-Fi E Key. PCIEX1_1 is disabled by default.
    • PCIEX1_2 shares bandwidth with SATA6G_7. PCIEX1_2 is disabled by default.
    • * 2. PCIeX16_3 will be disabled when using 28-lane CPU.
    • * 3. The M.2_2 socket shares bandwidth with SATA6G_1 port when using M.2 SATA devices.
    • * 4. The M.2_1 PCIe mode source is from X299 Chipset when using 44 and 28-lane CPU.
    • * 5. The SATA6G_7 shares bandwidth with PCIeX1_2.
    • * 6. The M.2 PCIE mode source from X299 Chipset supports Intel® Optane Memory