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ASUS PRIME X399-A Socket TR4 DDR4 EATX Motherboard

  • Socket TR4
  • Threadripper support
  • DDR4 support
  • EATX Form Factor

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QuickFind: 803362

Mfr part code: PRIME X399-A

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    ASUS PRIME X399-A Socket TR4 DDR4 EATX Motherboard Product Description




    • Ready for Ryzen™: Latest AMD socketTR4 for Threadripper™ processors.
    • 5-Way Optimization: One-click, system-wide tuning, delivering optimized overclocks and intelligent cooling for CPU or GPU-intensive tasks.
    • Industry-leading cooling options: Comprehensive controls for fans and water pumps, via Fan Xpert 4 software or the acclaimed ASUS UEFI.
    • Next-gen connectivity: Onboard U.2, M.2 and front-panel USB 3.1 Gen 2 connector.
    • M.2 heatsink: Ultra-efficient heatsink reduces M.2 SSD temperatures by up to 20°C for unthrottled transfer speeds and enhanced reliability.
    • Aura Sync: Controllable onboard RGB lighting easily syncs with an ever-growing portfolio of Aura Sync-capable hardware.




    ASUS Prime X399-A is the EATX motherboard that's been expertly engineered for professional content creators and power users who work hard by day and play harder by night. This powerful, innovative board puts a friendly face on advanced enthusiast controls, enabling you to maximize performance, cooling and personalization with ease. So, if you live to create, explore, and to push the boundaries, look no further than the Prime X399-A.





    AMD SocketTR4 for AMD Ryzen™ Threadripper™ Processors

    * Refer to for CPU support list


    AMD X399


    AMD Ryzen™ Threadripper™ Processors

    8 x DIMM, Max. 128GB, DDR4 3600(O.C.)/3466(O.C.)/3333(O.C.)/3200(O.C.)/3000(O.C.)/2800(O.C.)/2666/2400/2133 MHz ECC and non-ECC, Un-buffered Memory

    * 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

    Supports AMD 2-Way CrossFireX Technology

    Expansion Slots

    AMD Ryzen™ Threadripper™ Processors

    4 x PCIe 3.0 x16 (single@x16, dual@x16/x16, triple@x16/x16/x8 mode)

    AMD X399 chipset

    1 x PCIe 2.0 x4 (max at x4 mode)

    1 x PCIe 2.0 x1


    AMD Ryzen™ Threadripper™ Processors :

    1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)

    1 x M.2 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)

    1 x U.2 port

    AMD X399 chipset :

    6 x SATA 6Gb/s port(s),

    Support Raid 0, 1, 10


    Intel® I211-AT

    ASUS Turbo LAN Utility

    ASUS LAN Guard


    Realtek® ALC 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 Jack-retasking

    - High quality 120 dB (Line-out at rear) and 113 dB SNR recording input (Line-in)

    Audio Feature :

    - DTS Connect

    - DTS Headphone:X

    - 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

    - EMI protection cover to prevent electrical noise to affect the amplifier quality

    Separate layer for left and right track, ensuring both sound deliver equal quality

    USB Ports

    AMD Ryzen™ Threadripper™ Processors :

    8 x USB 3.1 Gen 1 port(s) (8 at back panel, , Type-A)

    AMD X399 chipset :

    1 x USB 3.1 Gen 2 port(s) (1 at mid-board)

    AMD X399 chipset :

    4 x USB 3.1 Gen 1 port(s) (4 at mid-board)

    AMD X399 chipset :

    4 x USB 2.0 port(s) (4 at mid-board)

    ASMedia® USB 3.1 Gen 2 controller :

    2 x USB 3.1 Gen 2 port(s) (Type-A + USB Type-CTM)

    Special Features

    OC Design - ASUS PRO Clock Technology

    - Full BCLK range for extreme overclocking performance

    ASUS Dual Intelligent Processors 5-Way Optimization by Dual Intelligent Processors 5 :

    - 5-Way Optimization tuning key perfectly consolidates TPU, EPU, DIGI+ VRM, Fan Expert 4, and Turbo App

    AURA :

    - Aura RGB Strip Headers

    - Aura Lighting Effects Synchronization with compatible ASUS ROG devices

    ASUS Exclusive Features :

    - USB BIOS Flashback

    - AI Suite 3

    - Ai Charger

    - Onboard Button : Power

    - ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface

    - Turbo LAN

    - Crystal Sound 3

    - PC Cleaner

    ASUS Quiet Thermal Solution :

    - Stylish Design Heat-pipe solution

    - Stylish Fanless Design with M.2 Heat-sink solution

    - ASUS Fan Xpert 4


    - ASUS EZ Flash 3

    - ASUS USB BIOS Flashback


    - Multi-language BIOS

    ASUS Q-Design :

    - ASUS Q-Shield

    - ASUS Q-Code

    - ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED)

    - ASUS Q-Slot


    - ASUS Q-Connector

    Gaming Aesthetics :

    - 3D printing friendly

    - AURA-RGB Lighting

    M.2 and U.2 Onboard (The Latest Transfer Technology with up to 32Gb/s Data-transfer Speeds for M.2 and U.2)

    Back I/O Ports

    1 x LAN (RJ45) port(s)

    2 x USB 3.1 Gen 2 (teal blue)Type-A + USB Type-CTM

    8 x USB 3.1 Gen 1 (blue)

    1 x Optical S/PDIF out

    5 x Audio jack(s)

    1 x USB BIOS Flashback Button(s)

    Internal I/O Ports

    1 x 3-pin Cover fan (COV_FAN) connector

    1 x Q_Code

    1 x U.2 port

    2 x RGB Header(s)

    2 x USB 3.1 Gen 1 connector(s) support(s) additional 4 USB 3.1 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 storage devices support (SATA & PCIE 3.0 x 4 mode)

    1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)

    6 x SATA 6Gb/s connector(s)

    1 x M.2_FAN connector

    1 x CPU Fan connector(s)

    1 x CPU OPT Fan connector(s)

    3 x Chassis Fan connector(s)

    1 x AIO_PUMP connector

    1 x W_PUMP+ connector

    1 x 24-pin EATX Power connector(s)

    1 x 8-pin ATX 12V Power connector(s)

    1 x 4-pin ATX 12V Power connector(s)

    1 x Front panel audio connector(s) (AAFP)

    1 x System panel(s)

    1 x 5-pin EXT_FAN(Extension Fan) connector

    1 x Thermal sensor connector(s)

    1 x Power-on button(s)

    1 x Clear CMOS button(s)

    1 x USB 3.1 Gen 2 front panel connector


    User's manual

    ASUS Q-Shield

    1 x Vertical M.2 bracket set

    4 x SATA 6Gb/s cable(s)

    1 x M.2 Screw Package

    1 x Supporting DVD

    1 x SLI HB BRIDGE(2-WAY-M)

    1 x Q-Connector


    128 Mb Flash ROM, UEFI AMI BIOS, PnP, WfM2.0, SM BIOS 3.0, 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


    WfM 2.0, DMI 3.0, WOL by PME, PXE

    Operating System

    Windows® 10 64-bit

    Form Factor

    Extended ATX Form Factor

    12 inch x 10.6 inch ( 30.5 cm x 26.9 cm )

    Technical Specifications


    Product Type Motherboard - extended ATX
    Chipset Type AMD X399
    Processor Socket Socket TR4
    Max Processors Qty 1
    Compatible Processors Ryzen ThreadRipper

    Supported RAM

    Max Size 128 GB
    Technology DDR4
    Bus Clock 2400 MHz, 2133 MHz, 2666 MHz, 2800 MHz (O.C.), 3000 MHz (O.C.), 3200 MHz (O.C.), 3333 MHz (O.C.), 3466 MHz (O.C.), 3600 MHz (O.C.)
    Supported RAM Integrity Check Non-ECC, ECC
    Registered or Buffered Unbuffered


    Type HD Audio (8-channel)
    Audio Codec Realtek ALCS1220A
    Compliant Standards DTS Connect, High Definition Audio, DTS Headphone:X


    Network Controller Intel I211-AT
    Network Interfaces Gigabit Ethernet

    Expansion / Connectivity

    Expansion Slots 1 x CPU ¦ 8 x DIMM 288-pin ¦ 4 x PCIe 3.0 x16 (dual x16 mode; triple: x16, x16, x8 mode) ¦ 1 x PCIe 2.0 x4 ¦ 1 x PCIe 2.0 x1
    Storage Interfaces SATA-600 -connectors: 6 x 7pin Serial ATA - 6 devices - RAID 0 / RAID 1 / RAID 10 ¦ SATA-600 / PCIe 3.0 -connectors: 2 x M.2 ¦ PCIe 2.0 -connectors: 1 x U.2
    Interfaces 1 x LAN (Gigabit Ethernet) ¦ 1 x TOSLINK ¦ 1 x USB 3.1 Gen 2 ¦ 1 x USB-C Gen2 ¦ 8 x USB 3.1 Gen 1 ¦ 1 x microphone - mini-jack ¦ 1 x audio line-in - mini-jack ¦ 1 x audio line-out - mini-jack ¦ 1 x audio line-out (center/subwoofer) - mini-jack ¦ 1 x audio line-out (rear) - mini-jack
    Internal Interfaces 1 x USB 3.1 Gen 2 - header ¦ 4 x USB 3.1 Gen 1 - header ¦ 4 x USB 2.0 - header ¦ 1 x audio - header
    Power Connectors 4-pin ATX12V connector, 24-pin main power connector, 8-pin ATX12V connector


    BIOS Features WfM 2.0 support, Multilingual BIOS, ASUS Quiet Thermal Solution, USB BIOS Flashback, UEFI BIOS, ASUS EZ Flash 3, DMI 3.0 support
    Sleep / Wake Up Wake on LAN (WOL), wake on PME
    Hardware Features Jack retasking, ASUS Q-Design, Q-DIMM, ASUS EZ DIY, Q-LED, Q-Slot, ASUS Q-Connector, audio jack detect technology, ASUS EPU (Energy Processing Unit), ASUS Q-Shield, NVIDIA 3-way SLI Technology Support, NVIDIA Quad SLI Technology Support, NVIDIA 2-way SLI Technology Support, ASUS TPU (TurboV Processing Unit), ASUS DIGI+ VRM, Fanless Design Heatsink, Fanless Design Heat-pipe, Q-Code, AMD CrossFireX technology support, AMD Quad CrossFireX technology support, AMD 3-way CrossFireX technology support, Preboot eXecution Environment (PXE), Clear CMOS Button, anti-pop function, Turbo LAN, Dual Intelligent Processors 5, LANGuard, ASUS Crystal Sound 3, ASUS PRO Clock Technology, AURA RGB Lighting Control, ASUS Fan Xpert 4, ASUS SafeSlot, 3D printing friendly


    Included Accessories 1 x M.2 screw, I/O back cover, vertical M.2 bracket set
    Cables Included 4 x Serial ATA cable ¦ 1 x SLI bridge
    Software Included ASUS AI Charger, ASUS AI Suite III, ASUS Turbo App, PC Cleaner, ASUS EZ Flash 3
    Width 30.5 cm
    Depth 26.9 cm

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