Motherboard PRIME X370-A
E12715 First Edition April 2017 Copyright © 2017 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....................................................................................... iv About this guide.......................................................................................... iv Package contents........................................................................................ vi PRIME X370-A specifications summary.................................................... vi Chapter 1: Product introduction 1.1 Before you proceed...........................
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.
Where to find more information Refer to the following sources for additional information and for product and software updates. 1. ASUS websites The ASUS website provides updated information on ASUS hardware and software products. Refer to the ASUS contact information. 2. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package.
Package contents Check your motherboard package for the following items. Motherboard ASUS PRIME X370-A motherboard Cables 2 x Serial ATA 6.0 Gb/s cables Accessories 1 x I/O shield 1 x M.2 screw package Application DVD 1 x Support DVD Documentation 1 x User Manual If any of the above items is damaged or missing, contact your retailer.
PRIME X370-A specifications summary AMD X370 Chipset: - 6 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support Storage AMD Ryzen™ Processors: - 1 x M.2 socket 3 with M Key, Type 2242 / 2260 / 2280 / 22110 (PCIe 3.0 x4 and SATA modes) storage devices support AMD 7th Generation A-series / Athlon™ Processors: - 1 x M.2 socket 3 with M Key, Type 2242 / 2260 / 2280 / 22110 (PCIE 3.
PRIME X370-A specifications summary 1 x PS/2 keyboard/mouse combo port 1 x HDMI port 1 x DVI-D port Rear panel I/O ports 1 x D-Sub port 1 x LAN (RJ-45) port 2 x USB 3.1 Gen 2 ports (teal blue, Type A) 4 x USB 3.1 Gen 1 ports 2 x USB 2.0/1.1 ports 3 x Audio jacks support 8-channel audio output 1 x USB 3.1 Gen 1 connector support additional 2 USB 3.1 Gen 1 ports 2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports 1 x M.
1 Product introduction 1.1 Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. 1.2 • 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.
1.2.1 Layout contents Connectors / Jumpers / Slots / LED Page 1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V) 1-2 2. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN1/2) 1-2 3. Fan RGB header (4-pin FAN_RGB_HEADER) 1-3 4. M.2 Socket 3 1-3 5. AMD AM4 CPU socket 1-3 6. DDR4 DIMM slots 1-4 7. AMD X370 SATA 6.0Gb/s ports (SATA6G_1~6) 1-4 8. System panel connector (20-5 pin PANEL) 1-4 9. USB 3.1 Gen 1 connector (20-1 pin USB3_12) 1-4 10. USB 2.
CHA_FAN1 CHA_FAN2 CHA FAN PWM CHA FAN IN CHA FAN PWR GND GND CHA FAN PWR CHA FAN IN CHA FAN PWM Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! Do not place jumper caps on the fan connectors! The CPU_FAN connector supports a CPU fan of maximum 1A (12 W) fan power. GND CPU FAN PWM CPU FAN IN CPU FAN PWR CPU_FAN 3.
6. DDR4 DIMM slots Install 2 GB, 4 GB, 8 GB, and 16 GB unbuffered ECC and non-ECC DDR4 DIMMs into these DIMM sockets. For more details, refer to System memory. AMD X370 SATA 6.0Gb/s ports (7-pin SATA6G_1~6) SATA6G These ports connect to SATA 6.0 Gb/s hard disk drives via SATA 6.0 Gb/s signal cables. System panel connector (20-5 pin PANEL) This 4-pin connector is for the system power LED. Connect the chassis power LED cable to this connector.
USB 2.0 connectors (10-1 pin USB3~6) USB34 PIN 1 Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! Serial port connector (10-1 pin COM) COM RXD DTR DSR CTS This connector is for a serial (COM) port. Connect the serial port module cable to this connector, then install the module to a slot opening at the back of the system chassis.
. Clear RTC RAM (2-pin CLRTC) This header allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, 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. To erase the RTC RAM: Turn OFF the computer and unplug the power cord. 2. Use a metal object such as a screwdriver to short the two pins. 3.
IRQ assignments for this motherboard • For 7th Generation A-series / Athlon™ processors A B C D E F G H PCIEx16_1 – – – shared – – – – PCIEx16_2 shared – – – – – – – PCIEx1_1 shared – – – – – – – PCIEx1_2 – – – shared – – – – PCI1 shared – – – – – – – PCI2 – shared – – – – – – M.2 – – – shared – – – – CPU USB 3.
1.2.2 Rear panel connectors 1 2 11 10 3 4 9 5 6 7 3 8 1. PS/2 keyboard/mouse combo port. This port is for a PS/2 mouse or keyboard. 2. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices. 3. USB 3.1 Gen 1 ports. These two 9-pin Universal Serial Bus (USB) ports connect to USB 3.1 Gen 1 devices. • USB 3.1 Gen 1 devices can only be used for data storage.
Audio 2.1, 4.1, 5.1, or 7.1-channel configuration Port Light Blue (Rear panel) Lime (Rear panel) Pink (Rear panel) Lime (Front panel) Headset 2.1-channel Line In Line Out Mic In - 4.1-channel Rear Speaker Out Front Speaker Out Mic In - 5.1-channel Rear Speaker Out Front Speaker Out Bass / Center - 7.1-channel Rear Speaker Out Front Speaker Out Bass / Center Side Speaker Out 9. HDMI port.
1.3 Central Processing Unit (CPU) The motherboard comes with an AMD AM4 socket designed for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors. Unplug all power cables before installing the CPU. The AM4 socket has a different pinout from the FM2+ / FM2 socket. Ensure that you use a CPU designed for the AM4 socket. The CPU fits in only one correct orientation.
Installing the CPU heatsink and fan assembly Type 1 1 2 3 4 Type 2 1 2 Remove the screws and the retention module only. Do not remove the plate on the bottom.
1.4 System memory Overview This motherboard comes with four Double Data Rate 4 (DDR4) Dual Inline Memory Module (DIMM) sockets. The figure illustrates the location of the DDR4 DIMM sockets: Sockets DIMM_A1 DIMM_A2 Channel DIMM_B1 DIMM_B2 Channel A DIMM_A1 & DIMM_A2 Channel B DIMM_B1 & DIMM_B2 • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration.
1.5 1.5.1 Software support Installing an operating system This motherboard supports Windows® 10 (64-bit) Operating Systems (OS). Always install the latest OS version and corresponding updates to maximize the features of your hardware. Motherboard settings and hardware options vary. Refer to your OS documentation for detailed information. 1.5.
2 BIOS information 2.1 Managing and updating your BIOS Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update utility. 2.1.1 EZ Update EZ Update is a utility that allows you to automatically update your motherboard’s softwares, drivers and the BIOS version easily. With this utlity, you can also manually update the saved BIOS and select a boot logo when the system goes into POST.
2.1.2 ASUS EZ Flash 3 The ASUS EZ Flash 3 feature allows you to update the BIOS without using an OS‑based utility. • Ensure that you load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu. • Check your Internet connection before updating the BIOS via the Internet. To update the BIOS using EZ Flash 3: 1. Enter the Advanced Mode of the BIOS setup program.
2.1.3 ASUS CrashFree BIOS 3 utility The ASUS CrashFree BIOS 3 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 updated BIOS file. • Before using this utility, rename the BIOS file in the removable device into PRX370A.CAP. • The BIOS file in the support DVD may not be the latest version.
Booting the system in DOS environment To boot the system in DOS: 1. Insert the USB flash drive with the latest BIOS file and BIOS Updater to the USB port. 2. Boot your computer then press to launch the select boot device screen. 3. When the select boot device screen appears, insert the Support DVD into the optical drive then select the optical drive as the boot device. When the booting message appears, press within five (5) seconds to enter FreeDOS prompt.
2.2 BIOS setup program Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS screens include navigation keys and brief online help to guide you in using the BIOS Setup program. Entering BIOS Setup 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.
2.2.1 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, fan profile and boot device priority. To access the Advanced Mode, click Advanced Mode(F7) or press . The default screen for entering the BIOS setup program can be changed. Refer to the Setup Mode item in section 2.8 Boot menu for details.
2.2.2 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 access the EZ Mode, click EzMode(F7) or press .
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 Boot For changing the advanced system settings For displaying the system temperature, power status, and changing the fan settings For changing the system boot configuration Tool Exit For configuring options for special functions For selecting the
General help At the bottom left corner of the menu screen is a brief description of the selected item. Use key to capture the BIOS screen and save it to the removable storage device. Configuration fields These fields show the values for the menu items. If an item is user-configurable, you can change the value of the field opposite the item. You cannot select an item that is not user-configurable. A configurable field is highlighted when selected.
2.2.3 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 Click to manually configure your fans To configure your fans: 2-11 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).
2.3 My Favorites MyFavorites is your personal space where you can easily save and access your favorite BIOS 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 MyFavorites screen.
3. Select an item from main menu panel, then click the submenu that you want to save as favorite from the submenu panel and click . You cannot add the following items to My Favorite items: • User-managed items such as language and boot order 4. Click Exit (ESC) or press key to close Setup Tree Map screen. 5. Go to My Favorites menu to view the saved BIOS items. 2.4 Main menu The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup program.
Administrator Password If you have set an administrator password, we recommend that you enter the administrator password for accessing the system. To set an administrator password: 1. Select the Administrator Password item and press . 2. From the Create New Password box, key in a password, then press . 3. Confirm the password when prompted. To change an administrator password: 1. Select the Administrator Password item and press . 2.
2.5 Ai Tweaker menu The Ai Tweaker menu items allow you to configure overclocking-related items. Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field values can cause the system to malfunction. The configuration options for this section vary depending on the CPU and DIMM model you installed on the motherboard. Scroll down to display other BIOS items. 2.5.
2.5.2 Memory Frequency [Auto] The configuration options displayed vary depending on the CPU installed. Allows you to set the memory operating frequency. Configuration options: [Auto] [DDR41346MHz] [DDR4-1616MHz] [DDR4-1885MHz] [DDR4-2154MHz] [DDR4-2424MHz] Selecting a very high memory frequency may cause the system to become unstable! If this happens, revert to the default setting. 2.5.3 APU Multiplier [Auto] This item appears only when you install an AMD 7th Generation A-series/AthlonTM processor.
2.5.6 OC Tuner [Keep Current Settings] This item allows you to automatically overclock the CPU and DRAM frequencies and voltage for an enhanced system performance. It also accelerates the CPU graphics performance to the extreme depending on the CPU graphics loading. Configuration options: [Keep Current Settings] [OC Tuner] Ensure that you installed an efficient CPU fan for CPU and graphics loading before selecting either [OC Tuner].
VDDCR CPU Power Phase Control [Optimized] Phase number is the number of working VRM phase. Increasing phase number under heavy system loading to get more transient and better thermal performance. Reducing phase number under light system loading to increase VRM efficiency. [Optimized] Loads the ASUS optimized phase tuning profile. [Extreme] Proceeds the full phase mode. DO NOT remove the thermal module when switching to Extreme. The thermal conditions should be monitored.
2.5.12 DRAM Voltage [Auto] Allows you to set the DRAM voltage. Use the <+> and <-> keys to adjust the value. The values range from 1.2V to 1.35V with a 0.005V interval. 2.5.13 1.05V SB Voltage [Auto] Allows you to set the 1.05V Southbridge voltage. Use the <+> and <-> keys to adjust the value. The values range from 1.05V to 1.1V with a 0.05V interval. 2.5.14 2.5V SB Voltage [Auto] Allows you to set the 2.5V Southbridge voltage. Use the <+> and <-> keys to adjust the value. The values range from 2.
2.6 Advanced menu The Advanced menu items allow you to change the settings for the CPU and other system devices. Be cautious when changing the settings of the Advanced menu items. Incorrect field values can cause the system to malfunction. AMD fTPM switch [Disabled] Enables or disables AMD CPU firmware TPM. Configuration options: [Enabled] [Disabled] When AMD firmware TPM is disabled, all data saved on it will be lost. 2.6.
CPB Mode [Enabled] Enables or disables the CPB (Core Performance Boost) mode. Configuration options: [Disabled] [Enabled] C6 Mode [Enabled] Enables or disables C6 mode. Configuration options: [Enabled] [Disabled] IOMMU [Disabled] Set this item to [Enabled] to show IOMMU Mode. Configuration options: [Enabled] [Disabled] [Auto] Bank Interleaving [Enabled] Enables or disables the bank memory interleaving.
SATA Port Enable [Enabled] Enables or disables the SATA ports. Configuration options: [Disabled] [Enabled] SATA Mode [AHCI] Allows you to set the SATA configuration. [RAID] Set to [RAID] when you want to create a RAID configuration from the SATA hard disk drives. [AHCI] Set to [AHCI] when you want the SATA hard disk drives to use the AHCI (Advanced Host Controller Interface).
Realtek LAN Controller [On] [On] Enables the Realtek LAN controller. [Off] Disables the controller. Realtek PXE OPROM [Off] This item appears only when you set the Realtek LAN Controller item to [On] and allows you to enable or disable the Rom of the Realtek LAN controller. Configuration options: [On] [Off] Charging USB devices in Power State S5 [Enabled] [Enabled] Charges USB devices even in when the system is in Power State S5. [Disabled] Disables this function.
2.6.6 Network Stack Configuration Network Stack [Disabled] This item allows user to disable or enable the UEFI network stack. Configuration options: [Disabled] [Enabled] The following two items appear only when you set the previous item to [Enabled]. Ipv4 / Ipv6 PXE Support [Enabled] This item allows you to enable or disable the Ipv4/Ipv6 PXE wake event. Configuration options: [Disable Link] [Enabled] 2.6.7 HDD/SSD SMART Information This menu displays the SMART information of the connected devices.
2.6.9 AMD CBS The items in this menu display the CPU-related information that the BIOS automatically detects. This item appears only when you install an AMD RyzenTM processor. 2.7 Monitor menu The Monitor menu displays the system temperature/power status, and allows you to change the fan settings. 2.7.1 CPU/ MB Temperature [xxxºC/xxxºF]/ [Ignore] The onboard hardware monitor automatically detects and displays the CPU and motherboard temperatures.
2.7.4 Q-Fan Configuration The subitems in this menu allows you to configure the Q-Fan features. Q-Fan Tuning Click [OK] button to detect the lowest speed and configure the minimum duty circle for each fan. Do not shut down or reset your system during the tuning progress. Configuration options: [Ok] [Cancel] CPU Q-Fan Control [PWM Mode] [Disabled] Disables the CPU Q-Fan control feature. [PWM Mode] Enable the CPU Q-Fan control in PWM mode for the 4-pin CPU fan.
CPU Fan Min. Duty Cycle(%) [20] Use the <+> and <-> keys to adjust the minimum CPU fan duty cycle. The values range from 20% to 100%. When the CPU temperature is under the lower limit, the CPU fan operates at the minimum duty cycle. 2.7.6 Chassis Fan(s) Configuration The subitems in this menu allows you to configure the chassis Q-Fan features. Chassis Fan 1/2 Q-Fan Control [DC mode] [PWM mode] Enables the chassis Q-Fan control in PWM mode for the 4-pin chassis fan.
Chassis Fan 1/2 Lower Temperature [40] Use the <+> or <-> keys to adjust the chassis fans’ lower temperature. The values range from 0°C to 75°C. Chassis Fan 1/2 Min. Duty Cycle(%) [60] Use the <+> or <-> keys to adjust the minimum chassis fan duty cycle. The values range from 60% to 100%. When the CPU temperature is under the lower limit, the chassis fan operates at the minimum duty cycle. 2.8 Boot menu The Boot menu items allow you to change the system boot options.
2.8.2 Boot Configuration Boot Logo Display [Auto] [Auto] Adjusts logo automatically based on Windows® display requrements. [Full Screen] Maximize the boot logo size. [Disabled] Hide the logo during POST. POST Delay Time [3 sec] This item appears only when you set Boot Logo Display to [Auto] and [Full Screen]. This item allows you to select the desired additional POST waiting time to easily enter the BIOS setup. You can only execute the POST delay time during Normal Boot.
Launch CSM [Enabled] [Auto] The system automatically detects the bootable devices and the add-on devices. [Enabled] For better compatibility, enable the CSM to fully support the non-UEFI driver add-on devices or the Windows® UEFI mode. [Disabled] Disable the CSM to fully support the Windows® Security Update and Security Boot. The following four items appear when you set Launch CSM to [Enabled]. Boot Device Control [UEFI and Legacy OPROM] Allows you to select the type of devices that you want to boot up.
PK Management The Platform Key (PK) locks and secures the firmware from any non-permissible changes. The system verifies the PK before your system enters the OS. Save to File This item allows you to save the downloaded PK to a USB storage device. Set New Key This item allows you to load the downloaded PK from a USB storage device. The PK file must be formatted as a UEFI variable structure with time-based authenticated variable. Delete Key This item allows you to delete the PK from your system.
Delete Key Allows you to delete the db file from your system. Configuration options: [Yes] [No] DBX Management The DBX (Revoked Signature database) lists the forbidden images of db items that are no longer trusted and cannot be loaded. Save to File Allows you to load the downloaded dbx to a USB storage device. Set New Key Allows you to load the downloaded dbx from a USB storage device. Append Key Allows you to load the additional KEK from a storage device for an additional db and dbx loaded management.
2.9 Tool menu The Tool menu items allow you to configure options for special functions. Select an item then press to display the submenu. 2.9.1 ASUS EZ Flash 3 Utility Allows you to run ASUS EZ Flash 3. Press [Enter] to launch the ASUS EZ Flash 3 screen. For more details, see section 2.1.2 ASUS EZ Flash 3. 2.9.2 Setup Animator [Disabled] Enables or disables the Setup animator. Configuration options: [Disabled] [Enabled] 2.9.
2.9.4 ASUS SPD Information DIMM Slot number [DIMM_A1] Displays the Serial Presence Detect (SPD) information of the DIMM module installed on the selected slot. Configuration options: [DIMM_A1] [DIMM_B1] [DIMM_A2] [DIMM_B2] 2.10 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.
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.
Canadian Department of Communications Statement This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. This class B digital apparatus complies with Canadian ICES-003.
Google™ License Terms Copyright© 2017 Google Inc. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 X370-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.
