Motherboard PRIME X399-A
E13889 Revised Edition V3 January 2018 Copyright© 2018 ASUSTeK COMPUTER INC. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
Contents Safety information........................................................................................................ v About this guide.......................................................................................................... vi PRIME X399-A specifications summary.................................................................. viii Package contents.......................................................................................................
3.3 My Favorites.............................................................................................. 3-10 3.4 Main menu................................................................................................. 3-12 3.5 Ai Tweaker menu...................................................................................... 3-12 3.6 Advanced menu........................................................................................ 3-13 3.6.1 Trusted Computing...........................
Safety information Electrical safety • To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
About this guide This user guide contains the information you need when installing and configuring the motherboard. How this guide is organized This guide contains the following parts: 1. Chapter 1: Product Introduction This chapter describes the features of the motherboard and the new technology it supports. It includes description of the switches, jumpers, and connectors on the motherboard. 2.
Conventions used in this guide To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task.
PRIME X399-A specifications summary CPU Chipset AMD SocketTR4 socket for AMD Ryzen™ Threadripper™ processors * Refer to www.asus.com for the CPU support list. AMD X399 AMD Ryzen™ Threadripper™ Processors Memory -8xD IMM, max. 128GB, DDR4 3600+(O.C.)/3466(O.C.)/3333(O.C.)/3200(O.C.)/3 000(O.C.)/2800(O.C.)/2666/2400/2133 MHz, ECC and non-ECC, un-buffered memory - Quad channel memory architecture * Please refer to Memory QVL (Qualified Vendors List) for details.
PRIME X399-A specifications summary Realtek® S1220A 8-channel high definition audio CODEC featuring Crystal Sound 3 - Power pre-regulator reduces power input noise to ensure consistent performance - Separate layer for left and right track, ensuring both sound deliver equal quality - Impedance sense for front and rear headphone outputs - Audio shielding ensures precise analog/digital separation and greatly reduced multi-lateral interference - EMI protection cover to prevent electrical noise to affect the amp
PRIME X399-A specifications summary AURA SYNC 3D Printing Friendly design Turbo LAN File Transfer ASUS Exclusive Features PC Cleaner Q-Design - ASUS Q-Code - ASUS Q-Connector - ASUS Q-DIMM - ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED) - ASUS Q-Shield - ASUS Q-Slot ASUS SafeSlot - Protect your graphics card Investment ASUS 5X Protection III - ASUS SafeSlot Core - Fortified PCIe with solid soldering - ASUS LANGuard - Protects against LAN surges, lightning strikes and sta
PRIME X399-A specifications summary 1 x USB 3.1 Gen 2 front panel connector 2 x USB 3.0 Gen 1 connectors support additional 4 USB ports (19-pin) 2 x USB 2.0 connectors support additional 4 USB ports 1 x M.2_1 Socket 3 with M key, type 2242/2260/2280 storage devices support (both SATA & PCIE 3.0 x 4 mode) 1 x M.2_2 Socket 3 with vertical M Key, type 2242/2260/2280/22110 storage devices support (both SATA & PCIE 3.0 x 4 mode) 1 x U.2 port 6 x SATA 6.
Package contents Check your motherboard package for the following items. Motherboard ASUS PRIME X399-A motherboard 4 x Serial ATA 6.0 Gb/s cables Cables 1 x ASUS SLI HB BRIDGE (2-WAY-M) 1 x Q-Connector Accessories 1 x M.2 vertical bracket 1 x M.2 screw package 1 x ASUS Q-Shield Application DVD Motherboard support DVD Documentation User manual If any of the above items is damaged or missing, contact your retailer.
Installation tools and components 1 Bag of screws Phillips (cross) screwdriver PC chassis Power supply unit AMD SocketTR4 CPU AMD SocketTR4 compatible CPU Fan DDR4 DIMM SATA hard disk drive SATA optical disc drive (optional) Graphics card M.2 SSD module (optional) The tools and components in the table above are not included in the motherboard package.
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Product Introduction Product Introduction 1.1 Motherboard overview 1.1.1 Before you proceed 1 Chapter 1 Chapter 1: Take note of the following precautions before you install motherboard components or change any motherboard settings. • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity.
1.1.2 Motherboard layout 1 26.9cm(10.6in) 2 3 1 4 5 Chapter 1 CPU_OPT CPU_FAN RGB_HEADER2 DIGI+ EPU BIOS_FLBK EATX12V_1 BOOT VGA CPU DRAM DIGI+ CHA_FAN1 AUDIO 30.5cm(12.0in) EATXPWR 4 M.
Layout contents ASUS PRIME X399-A Page 1-5 1-4 1-25 1-22 Chapter 1 Connectors/Jumpers/Buttons and switches/Slots 1. DDR4 DIMM slots 2. SocketTR4 CPU socket 3. RGB header (4-pin RGB_HEADER1-2) 4. ATX power connectors (24-pin EATXPWR; 8-pin EATX12V_1; 4-pin EATX12V_2) 5. CPU, CPU optional, cover, AIO pump, water pump+, extension, M.2, and chassis fan connectors (4-pin CPU_FAN; 4-pin CPU_OPT; 3-pin COV_FAN; 4-pin AIO_PUMP; 4-pin W_PUMP+; 4-pin M.2_FAN; 5-pin EXT_FAN; 4-pin CHA_FAN1-3) 6. M.2 sockets [M.
1.1.3 Central Processing Unit (CPU) The motherboard comes with a SocketTR4 socket designed for the AMD Ryzen™ Threadripper™ processors. Chapter 1 PRIME X399-A CPU SocketTR4 The SocketTR4 socket has a different pinout design. Ensure that you use a CPU designed for the SocketTR4 socket. The CPU fits in only one correct orientation.
1.1.4 System memory Chapter 1 The motherboard comes with eight DDR4 (Double Data Rate 4) Dual Inline Memory Modules (DIMM) slots. DIMM_B2 DIMM_B1* DIMM_A2 DIMM_A1* DIMM_C1* DIMM_C2 DIMM_D1* DIMM_D2 A DDR4 module is notched differently from a DDR, DDR2, or DDR3 module. DO NOT install a DDR, DDR2, or DDR3 memory module to the DDR4 slot.
Memory configurations You may install 2 GB, 4 GB, 8 GB and 16 GB unbuffered ECC and non-ECC DDR4 DIMMs into the DIMM sockets. Chapter 1 1-6 • You may install varying memory sizes in Channel A, Channel B, Channel C, and Channel D. The system maps the total size of the lower-sized channel for the quad channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation.
1.1.5 Expansion slots Chapter 1 Unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard components. PCIEX16_1 PCIEX4 PCIEX16_2 PCIEX16_3 PCIEX1 PCIEX16_4 Slot No. Slot Description 1 PCIe 3.0/2.0 x16_1 slot 2 PCIe 2.0 x4 slot 3 PCIe 3.0/2.0 x16_2 slot 4 PCIe 3.0/2.0 x16_3 slot 5 PCIe 2.0 x1 slot 6 PCIe 3.0/2.
AMD Ryzen™ Threadripper™ Processors VGA Configuration Chapter 1 1-8 PCI Express 3.0 operating mode Single VGA SLI™/CFX 3-Way SLI™/CFX PCIe x16_1 x16 x16 x16 PCIe x16_2 N/A N/A N/A PCIe x16_3 N/A x16 x16 PCIe x16_4 N/A N/A x8 • We recommend that you provide sufficient power when running CrossFireX™ or SLI™ mode. • Connect chassis fans to the motherboard chassis fan connectors when using multiple graphics cards for better thermal environment.
1.1.6 1. Jumpers, buttons and holes Clear RTC RAM jumper (2-pin CLRTC) Chapter 1 This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. CLRTC PIN 1 PRIME X399-A Clear RTC RAM To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2.
2. Power-on button Chapter 1 The motherboard comes with a power-on button that allows you to power up or wake up the system. The button also lights up when the system is plugged to a power source indicating that you should shut down the system and unplug the power cable before removing or installing any motherboard component. PWR_SW PRIME X399-A Power-on button 3. 3D Mount holes Secure 3D printed parts to these 3D Mount holes for a personalized motherboard.
1.1.7 1. Onboard LEDs POST State LEDs Chapter 1 The POST State LEDs provide the status of these key components during POST (Power-On Self-Test): CPU, memory modules, VGA card, and hard disk drives. If an error is found, the critical component’s LED stays lit up until the problem is solved. BOOT (YELLOW GREEN) VGA (WHITE) CPU (RED) DRAM (YELLOW) PRIME X399-A CPU/ DRAM/ BOOT_DEVICE/ VGA LED 2. Q-Code LED The Q-Code LED design provides you with a 2-digit error code that displays the system status.
Q-Code table Chapter 1 Code Description 00 Not used 01 Power on. Reset type detection (soft/hard).
Code Description 5A Internal CPU error 5B Reset PPI is not available 5C – 5F Reserved for future AMI error codes E0 S3 Resume is stared (S3 Resume PPI is called by the DXE IPL) E1 S3 Boot Script execution E2 Video repost E3 OS S3 wake vector call E4 – E7 Reserved for future AMI progress codes E8 S3 Resume Failed E9 S3 Resume PPI not Found EA S3 Resume Boot Script Error EB S3 OS Wake Error EC – EF Reserved for future AMI error codes F0 Recovery condition triggered by firmware (A
Q-Code table Chapter 1 Code Description 70 PCH DXE initialization is started 71 PCH DXE SMM initialization is started 72 PCH devices initialization 73 – 77 PCH DXE Initialization (PCH module specific) 78 ACPI module initialization 79 CSM initialization 7A – 7F Reserved for future AMI DXE codes 90 Boot Device Selection (BDS) phase is started 91 Driver connecting is started 92 PCI Bus initialization is started 93 PCI Bus Hot Plug Controller Initialization 94 PCI Bus Enumeration 95
Code Description A9 Start of Setup AA Reserved for ASL (see ASL Status Codes section below) AB Setup Input Wait AC Reserved for ASL (see ASL Status Codes section below) AD Ready To Boot event AE Legacy Boot event AF Exit Boot Services event B0 Runtime Set Virtual Address MAP Begin B1 Runtime Set Virtual Address MAP End B2 Legacy Option ROM Initialization B3 System Reset B4 USB hot plug B6 Clean-up of NVRAM B7 Configuration Reset (reset of NVRAM settings) B8– BF Reserved for f
ACPI/ASL Checkpoints Chapter 1 1-16 Code Description 0x01 System is entering S1 sleep state 0x02 System is entering S2 sleep state 0x03 System is entering S3 sleep state 0x04 System is entering S4 sleep state 0x05 System is entering S5 sleep state 0x10 System is waking up from the S1 sleep state 0x20 System is waking up from the S2 sleep state 0x30 System is waking up from the S3 sleep state 0x40 System is waking up from the S4 sleep state 0xAC System has transitioned into ACPI mode.
1.1.8 1. Internal connectors AMD Serial ATA 6.0 Gb/s connectors (7-pin SATA6G_1-6) Chapter 1 These connectors connect to Serial ATA 6.0 Gb/s hard disk drives via Serial ATA 6.0 Gb/s signal cables. If you installed Serial ATA hard disk drives, you can create a RAID 0, 1, and 10 configuration through the onboard AMD X399 chipset. PRIME X399-A Serial ATA 6.0Gb/s connectors These connectors are set to [AHCI] by default.
2. Front panel audio connector (10-1 pin AAFP) SENSE2_RETUR GND PRESENCE# SENSE1_RETUR Chapter 1 This connector is for a chassis-mounted front panel audio I/O module that supports HD Audio. Connect one end of the front panel audio I/O module cable to this connector.
4. USB 3.
5. USB 2.0 connectors (10-1 pin USB12; USB34) USB12 USB+5V USB_P4USB_P4+ GND NC USB+5V USB_P2USB_P2+ GND NC Chapter 1 These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480 Mb/s connection speed. USB34 USB+5V USB_P3USB_P3+ GND PIN 1 USB+5V USB_P1USB_P1+ GND PIN 1 PRIME X399-A USB 2.0 connectors 6.
7. CPU, CPU optional, cover, AIO pump, water pump+, extension, M.2, and chassis fan connectors (4-pin CPU_FAN; 4-pin CPU_OPT; 3-pin COV_FAN; 4-pin AIO_ PUMP; 4-pin W_PUMP+; 4-pin M.
8. ATX power connectors (24-pin EATXPWR; 8-pin EATX12V_1; 4-pin EATX12V_2) Chapter 1 These connectors are for ATX power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.
9. System panel connector (20-5 pin PANEL) +5V Ground Ground Speaker PWRSW SPEAKER PLED+ PLEDPWRBTN# GND +PWR_LED- Chapter 1 This connector supports several chassis-mounted functions. PANEL PLED- HDD_LED+ HDD_LEDGround RSTCON# NC PLED+ PIN 1 +HDD_LED- RESET +PWR_LED- PRIME X399-A System panel connector • System power LED (2-pin or 3-1 pin PWR_LED) The 2-pin or 3-1 pin connector is for the system power LED. Connect the chassis power LED cable to this connector.
10. M.2 sockets [M.2_1(Socket 3); M.2_2(Socket 3)] These sockets allow you to install M.2 SSD modules. Chapter 1 A A B M.2_2(SOCKET3) M.2_1(SOCKET3) 2280 2260 2242 B PRIME X399-A M.2 sockets • M.2_1 socket supports PCIe 3.0 x4 and SATA mode M Key design and type 2242 / 2260 / 2280 PCIe and SATA storage devices. • M.2_2 socket supports PCIe 3.0 x4 and SATA mode vertical M Key design and type 2242 / 2260 / 2280 / 22110 PCIe storage devices. The M.2 SSD module is purchased separately. 11. U.
12. AURA RGB headers (4-pin RGB_HEADER1-2) A Chapter 1 These connectors are for RGB LED strips. A RGB_HEADER2 PIN 1 +12V G R B B RGB_HEADER1 PIN 1 +12V G R B B B R G 12V PRIME X399-A RGB headers These RGB headers support 5050 RGB multi-color LED strips (12V/G/R/B), with a maximum power rating of 2A (12V), and no longer than 2 m. Before you install or remove any component, ensure that the ATX power supply is switched off or the power cord is detached from the power supply.
Chapter 1 1-26 Chapter 1: Product Introduction
Chapter 2: 2 Basic Installation Basic Installation 2.1 Building your PC system The diagrams in this section are for reference only. The motherboard layout may vary with models, but the installation steps are the same for all models. 2.1.1 CPU installation Unplug all power cables before installing the CPU. Chapter 2 The AMD SocketTR4 socket is compatible with AMD SocketTR4 processors. Ensure you use a CPU designed for the SocketTR4 socket. The CPU fits in only one correct orientation.
C C D 2 1 3 3 1 1 D D Slide the carrier frame with CPU into the rail frame until you hear a click sound, then remove the PnP cap. Remove the external cap. A Carrier frame with CPU External cap A A B PnP cap B Chapter 2 B Gently press down the rail frame until it latches to the socket housing, then press down the load C plate. C A C Drive the three screws slightly into the holes in sequence 1>2>3, just enough to attach the load plate to the socket.
2.1.
2.1.3 Chapter 2 2-4 Motherboard installation 1. Install the ASUS Q-Shield to the chassis rear I/O panel. 2. Place the motherboard into the chassis, ensuring that its rear I/O ports are aligned to the chassis’ rear I/O panel.
Place nine screws into the holes indicated by circles to secure the motherboard to the chassis. Chapter 2 3. PRIME X399-A DO NOT overtighten the screws! Doing so can damage the motherboard.
2.1.
ATX power connection Chapter 2 2.1.5 OR AND • DO NOT connect the 4-pin power plug only, the motherboard may overheat under heavy usage. • Ensure to connect the 8-pin power plug, or connect both the 8-pin and 4-pin power plugs.
2.1.
2.1.7 Front I/O connector To install ASUS Q-Connector To install USB 3.1 Gen 2 connector USB 3.1 Gen 2 To install USB 3.1 Gen 1 connector Chapter 2 This connector will only fit in one orientation. Push the connector until it clicks into place. To install USB 2.0 connector USB 3.1 Gen 1 USB 2.
2.1.
2.1.9 M.2 installation Chapter 2 OR Supported M.2 type varies per motherboard.
2.2 BIOS update utility USB BIOS Flashback USB BIOS Flashback allows you to easily update the BIOS without entering the existing BIOS or operating system. Simply insert a USB storage device to the USB port (the USB port hole marked in green on the I/O shield) then press the USB BIOS Flashback button for three seconds to automatically update the BIOS. To use USB BIOS Flashback: Chapter 2 1. Insert a USB storage device to the USB Flashback port. 2. Visit https://www.asus.
2.3 Motherboard rear and audio connections 2.3.1 Rear I/O connection 2 3 4 6 5 7 8 9 Chapter 2 1 Rear panel connectors 1. USB BIOS Flashback button 6. USB 3.1 Gen 1 ports 3, 4 2. USB 3.1 Gen 1 ports 5, 6, 7, and 8. 7. USB 3.1 Gen 2 Type-C™ port EC1 3. LAN (RJ-45) port* 8. Optical S/PDIF Out port 4. USB 3.1 Gen 1 ports 1, 2 (bottom port supports USB BIOS Flashback) 9. Audio jacks** 5. USB 3.
* LAN ports LED indications Activity Link LED Speed LED Status Description Status Description Off No link Off Orange Linked Orange 100 Mbps connection Orange (Blinking) Data activity Orange (Blinking then steady) Green Ready to wake up – from S5 mode 10 Mbps connection ACT/LINK LED SPEED LED 1 Gbps connection – LAN port You can disable the LAN controllers in BIOS. Due to hardware design, the LAN port’s LEDs may continue to blink even when disabled.
2.3.
Connect to 4 Speakers Connect to 6 Speakers Chapter 2 Connect to 8 Speakers 2-16 Chapter 2: Basic Installation
2.4 Starting up for the first time 1. After making all the connections, replace the system case cover. 2. Ensure that all switches are off. 3. Connect the power cord to the power connector at the back of the system chassis. 4. Connect the power cord to a power outlet that is equipped with a surge protector. 5. Turn on the devices in the following order: Monitor b. External SCSI devices (starting with the last device on the chain) c.
Chapter 2 2-18 Chapter 2: Basic Installation
Chapter 3: BIOS Setup BIOS Setup 3.1 Knowing BIOS 3 The new ASUS UEFI BIOS is a Unified Extensible Interface that complies with UEFI architecture, offering a user-friendly interface that goes beyond the traditional keyboardonly BIOS controls to enable a more flexible and convenient mouse input. You can easily navigate the new UEFI BIOS with the same smoothness as your operating system. The term “BIOS” in this user manual refers to “UEFI BIOS” unless otherwise specified.
3.2 BIOS setup program Use the BIOS Setup to update the BIOS or configure its parameters. The BIOS screen include navigation keys and brief onscreen help to guide you in using the BIOS Setup program. Entering BIOS at startup To enter BIOS Setup at startup, press or during the Power-On Self Test (POST). If you do not press or , POST continues with its routines. Entering BIOS Setup after POST To enter BIOS Setup after POST: • Press ++ simultaneously.
3.2.1 EZ Mode By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ Mode provides you an overview of the basic system information, and allows you to select the display language, system performance, mode and boot device priority. To access the Advanced Mode, select Advanced Mode or press the hotkey for the advanced BIOS settings. The default screen for entering the BIOS setup program can be changed. Refer to the Setup Mode item in section Boot menu for details.
3.2.2 Advanced Mode The Advanced Mode provides advanced options for experienced end-users to configure the BIOS settings. The figure below shows an example of the Advanced Mode. Refer to the following sections for the detailed configurations. To switch from EZ Mode to Advanced Mode, click Advanced Mode(F7) or press the hotkey.
Menu bar The menu bar on top of the screen has the following main items: My Favorites For saving the frequently-used system settings and configuration. Main For changing the basic system configuration Ai Tweaker For changing the overclocking settings Advanced For changing the advanced system settings Monitor For displaying the system temperature, power status, and changing the fan settings.
Search on FAQ Move your mouse over this button to show a QR code, scan this QR code on your mobile device to connect to the BIOS FAQ web page of the ASUS support website. You can also scan the following QR code: Hot keys This button above the menu bar contains the navigation keys for the BIOS setup program. Use the navigation keys to select items in the menu and change the settings. Scroll bar A scroll bar appears on the right side of a menu screen when there are items that do not fit on the screen.
3.2.3 QFan Control The QFan Control allows you to set a fan profile or manually configure the operating speed of your CPU and chassis fans.
Configuring fans manually Select Manual from the list of profiles to manually configure your fans’ operating speed. Speed points Select to manually configure your fans To configure your fans: Chapter 3 1. Select the fan that you want to configure and to view its current status. 2. Click and drag the speed points to adjust the fans’ operating speed. 3. Click Apply to save the changes then click Exit (ESC). 3.2.
OC Tuning To start OC Tuning: Press on your keyboard or click EZ Tuning Wizard screen. 2. Select a PC scenario Daily Computing or Gaming/Media Editing, then click Next. 3. Select a Main Cooling System BOX cooler, Tower cooler, Water cooler, or I’m not sure, then click Next. 4. After selecting the Main Cooling System, click Next then click Yes to start the OC Tuning. ASUS PRIME X399-A from the BIOS screen to open Chapter 3 1.
3.3 My Favorites My Favorites is your personal space where you can easily save and access your favorite BIOS items. My Favorites comes with several performance, power saving, and fast boot related items by default. You can personalize this screen by adding or removing items.
Adding items to My Favorites To add BIOS items: 1. Press on your keyboard or click Setup Tree Map screen. from the BIOS screen to open 2. On the Setup Tree Map screen, select the BIOS items that you want to save in My Favorites screen. Main menu panel Selected shortcut items Submenu panel Delete all favorite items Recover to default favorite items 3.
3.4 Main menu The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup program. The Main menu provides you an overview of the basic system information, and allows you to set the system date, time, language, and security settings. Security The Security menu items allow you to change the system security settings. 3.5 • If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC) RAM to clear the BIOS password. See section 1.1.
FID This item allows you to set the core frequency multiplier. Use the <+> or <-> to adjust the value. DID This item allows you to set the core frequency divisor. Use the <+> or <-> to adjust the value. Memory Frequency This item allows you to set the memory operating frequency. The configurable options vary with the BCLK (base clock) frequency setting. Select the auto mode to apply the optimized setting. Configuration options: [Auto] [DDR4-1333MHz] - [DDR4-4000MHz] 3.
SMART Self Test S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitoring system that shows a warning message during POST (Power-on Self Test) when an error occurs in the hard disks. Configuration options: [On] [Off] SATA6G_1(Gray) - SATA6G_6(Gray) SATA6G_1 - SATA6G_6 This item allows you to rename the selected SATA port.
PCIEX16_4 Bandwidth [X8 Mode] The PCIe x16_4 slot runs at x8 mode. [PCIe RAID Mode] T he PCIe x16_4 slot runs at x4 mode, which allows you to create a RAID array of 2 PCIe devices. Asmedia USB 3.1 Controller [Disabled] Disables the controller. [Enabled] Enables the rear USB 3.1 controller. USB Type C Power Switch for U31G2_1 / U31G2_EC1 [Auto] The system will automatically detect your USB Type C devices and provide suitable power if needed.
3.6.6 CPU Configuration The items in this menu show the CPU-related information that the BIOS automatically detects. The items in this menu may vary based on the CPU installed. NX Mode This item allows you enable or disable no-execute page protection function. Configuration options: [Disabled] [Enabled] SVM Mode This item allows you enable or disable CPU Virtualization. Configuration options: [Disabled] [Enabled] 3.6.
USB Single Port Control These items allow you to enable or disable the individual USB ports. Refer to section 1.1.2 Motherboard layout for the location of the USB ports. 3.6.10 AMD PBS The items in this menu display the CPU-related information that the BIOS automatically detects. This item appears only when you install an AMD Ryzen™ processor. Enumerate all IOMMU in IVRS [Enabled] Allows the IOMMU on the primary CPU die to map all device-visible virtual addresses.
3.8 Boot menu The Boot menu items allow you to change the system boot options. Fast Boot [Disabled] Allows your system to go back to its normal boot speed. [Enabled] Allows your system to accelerate the boot speed. The following items appear only when you set the Fast Boot to [Enabled]. Next Boot after AC Power Loss [Normal Boot] Returns to normal boot on the next boot after an AC power loss. [Fast Boot] Accelerates the boot speed on the next boot after an AC power loss.
Boot from Storage Devices This item allows you to select the type of storage devices that you want to launch. Configuration options: [Ignore] [Legacy only] [UEFI driver first] Boot from PCI-E Expansion Devices This item allows you to select the type of PCI-E/PCI expansion devices that you want to launch.
3.9.2 Secure Erase SSD speeds may lower over time as with any storage medium due to data processing. Secure Erase completely and safely cleans your SSD, restoring it to factory performance levels. Secure Erase is only available in AHCI mode. Ensure to set the SATA mode to AHCI. Click Advanced > SATA Configuration > SATA Mode > AHCI. To launch Secure Erase, click Tool > Secure Erase on the Advanced mode menu. Secure Erase is only supported on selected SATA SSDs, and cannot erase NVMe storage devices.
3.9.3 ASUS Overclocking Profile This item allows you to store or load multiple BIOS settings. Load from Profile This item allows you to load the previous BIOS settings saved in the BIOS Flash. Key in the profile number that saved your BIOS settings, press , and then select Yes. • DO NOT shut down or reset the system while updating the BIOS to prevent the system boot failure! • We recommend that you update the BIOS file only coming from the same memory/ CPU configuration and BIOS version.
3.10 Exit menu The Exit menu items allow you to load the optimal default values for the BIOS items, and save or discard your changes to the BIOS items. You can access the EZ Mode from the Exit menu. Load Optimized Defaults This option allows you to load the default values for each of the parameters on the Setup menus. When you select this option or if you press , a confirmation window appears. Select OK to load the default values.
3.11 Updating BIOS The ASUS website publishes the latest BIOS versions to provide enhancements on system stability, compatibility,and performance. However, BIOS updating is potentially risky. If there is no problem using the current version of BIOS, DO NOT manually update the BIOS. Inappropriate BIOS updating may result to system’s failure to boot. Carefully follow the instructions in this chapter to update your BIOS when necessary. Visit http://www.asus.
3.11.2 ASUS EZ Flash 3 ASUS EZ Flash 3 allows you to download and update to the latest BIOS through the Internet without having to use a bootable floppy disk or an OS‑based utility. Updating through the Internet varies per region and Internet conditions. Check your local Internet connection before updating through the Internet. To update the BIOS by USB: Chapter 3 3-24 1. Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select ASUS EZ Flash Utility and press . 2.
• This function can support devices such as a USB flash disk with FAT 32/16 format and single partition only. • DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure! Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu. See section 3.10 Exit Menu for details. 1. Enter the Advanced Mode of the BIOS setup program.
3.11.3 ASUS CrashFree BIOS 3 The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using the motherboard support DVD or a USB flash drive that contains the BIOS file. The BIOS file in the motherboard support DVD may be older than the BIOS file published on the ASUS official website. If you want to use the newer BIOS file, download the file at https://www.asus.
Chapter 4: RAID Support RAID Support 4.1 AMD RAID Array configurations 4 The motherboard comes with the RaidXpert2 Configuration Utility that supports Volume, RAIDABLE, RAID 0, RAID 1, and RAID 10 (depends on system licensing) configurations. If you want to install a Windows® operating system to a hard disk drive included in a RAID set, you have to create a RAID driver disk and load the RAID driver during OS installation. Refer to section 4.2 Creating a RAID driver disk for details. 4.1.
4.1.2 Installing storage devices The motherboard supports Serial ATA hard disk drives and NVMe SSD storage devices. For optimal performance, install identical drives of the same model and capacity when creating a disk array. Refer to Chapter 2 of this user manual for details on installing storage devices to your motherboard. 4.1.3 RaidXpert2 Configuration Utility in UEFI BIOS To enter the RaidXpert2 Configuration Utility in UEFI BIOS: 1. Enter the BIOS Setup during POST.
Creating a RAID set To create a RAID set: 1. From the RaidXpert2 Configuration Utility menu, go to Array Management > Create Array to enter the Create Array menu. The following screen appears: 2. When the RAID Level item is selected, press to select the RAID level to create, and then press . 3. Under Select Physical Disks, press . The following screen appears. Chapter 4 You can select SATA, SSD or both.
4. When return to the RAIDXpert2 Configuration Utility menu, select the Array Size and other detailed policies, press . Save changes when finish. You can specify the array size to be created. Choosing the value 0 will set the maximum supported array size when a valid configuration is selected. Deleting a RAID set Be cautious when deleting a RAID set. You will lose all data on the hard disk drives when you delete a RAID set. To delete a RAID set: 1.
2. Select On to confirm your choice and then select Yes to delete the RAID Array and return to the RAIDXpert2 Configuration Utility menu, or select No to cancel. 4.2 Creating a RAID driver disk 4.2.1 Creating a RAID driver disk in Windows® To install the RAID driver for Windows® OS: 1. During the OS installation, click Load Driver to allow you to select the installation media containing the RAID driver. 2.
Chapter 4 4-6 Chapter 4: RAID Support
Appendix Appendix Notices Federal Communications Commission Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: • This device may not cause harmful interference. • This device must accept any interference received including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
Compliance Statement of Innovation, Science and Economic Development Canada (ISED) This Class B digital apparatus complies with Canadian ICES-003, RSS-210, and CAN ICES3(B)/NMB-3(B). This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
REACH Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulatory framework, we published the chemical substances in our products at ASUS REACH website at http://csr.asus.com/english/REACH.htm. DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling.
Appendix English ASUSTeK Computer Inc. hereby declares that this device is in compliance with the essential requirements and other relevant provisions of related Directives. Full text of EU declaration of conformity is available at: www.asus.com/support Français AsusTek Computer Inc. déclare par la présente que cet appareil est conforme aux critères essentiels et autres clauses pertinentes des directives concernées.
ASUS contact information ASUSTeK COMPUTER INC. Address Telephone Fax Web site Technical Support Telephone Fax Online support 4F, No. 150, Li-Te Road, Peitou, Taipei 112, Taiwan +886-2-2894-3447 +886-2-2890-7798 www.asus.com +86-21-38429911 +86-21-5866-8722, ext. 9101# http://qr.asus.com/techserv ASUS COMPUTER INTERNATIONAL (America) Address 800 Corporate Way, Fremont, CA 94539, USA Telephone +1-510-739-3777 Fax +1-510-608-4555 Web site http://www.asus.
DECLARATION OF CONFORMITY Per FCC Part 2 Section 2. 1077(a) Asus Computer International Responsible Party Name: 800 Corporate Way, Fremont, CA 94539. Address: Phone/Fax No: (510)739-3777/(510)608-4555 hereby declares that the product Product Name : Motherboard Model Number : PRIME X399-A Conforms to the following specifications: FCC Part 15, Subpart B, Unintentional Radiators Supplementary Information: This device complies with part 15 of the FCC Rules.
