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PRIME B350M-A
Motherboard
E12357
First Edition
January 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”).
Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners’ benefit, without intent to infringe.
Offer to Provide Source Code of Certain Software
This product contains copyrighted software that is licensed under the General Public License (“GPL”), under the Lesser General Public License Version (“LGPL”) and/or other Free Open Source Software Licenses. Such software in this product is distributed without any warranty to the extent permitted by the applicable law. Copies of these licenses are included in this product.
Where the applicable license entitles you to the source code of such software and/or other additional data, you may obtain it for a period of three years after our last shipment of the product, either
(1)for free by downloading it from http://support.asus.com/download
or
(2)for the cost of reproduction and shipment, which is dependent on the preferred carrier and the location where you want to have it shipped to, by sending a request to:
ASUSTeK Computer Inc.
Legal Compliance Dept.
15 Li Te Rd.,
Beitou, Taipei 112
Taiwan
In your request please provide the name, model number and version, as stated in the About Box of the product for which you wish to obtain the corresponding source code and your contact details so that we can coordinate the terms and cost of shipment with you.
The source code will be distributed WITHOUT ANY WARRANTY and licensed under the same license as the corresponding binary/object code.
This offer is valid to anyone in receipt of this information.
ASUSTeK is eager to duly provide complete source code as required under various Free Open Source Software licenses. If however you encounter any problems in obtaining the full corresponding source code we would be much obliged if you give us a notification to the email address gpl@asus.com, stating the product and describing the problem (please DO NOT send large attachments such as source code archives, etc. to this email address).
ii
Contents
Safety information....................................................................................... |
iv |
About this guide.......................................................................................... |
iv |
Package contents........................................................................................ |
vi |
PRIME B350M-A specifications summary................................................. |
vi |
Chapter 1: |
Product introduction |
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1.1 |
Before you proceed...................................................................... |
1-1 |
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1.2 |
Motherboard overview................................................................. |
1-1 |
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1.3 |
Central Processing Unit (CPU).................................................. |
1-10 |
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1.4 |
System memory.......................................................................... |
1-12 |
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Chapter 2: |
BIOS information |
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2.1 |
Managing and updating your BIOS............................................. |
2-1 |
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2.2 |
BIOS setup program..................................................................... |
2-5 |
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2.3 |
Exit menu..................................................................................... |
2-10 |
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Appendix |
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Notices....................................................................................................... |
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A-1 |
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ASUS contact information........................................................................ |
A-4 |
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iii
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.
•Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged.
•Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit.
•Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company.
•If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
Operation safety
•Before installing the motherboard and adding components, carefully read all the manuals that came with the package.
•Before using the product, ensure all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately.
•To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.
•Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may be exposed to moisture.
•Place the product on a stable surface.
•If you encounter technical problems with the product, contact a qualified service technician or your retailer.
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:
•Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it supports. It includes descriptions of the switches, jumpers, and connectors on the motherboard.
•Chapter 2: BIOS information
This chapter discusses changing system settings through the BIOS Setup menus.
iv
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.
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 completing a task.
CAUTION: Information to prevent damage to the components when completing a task
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text |
Indicates a menu or an item to select. |
Italics |
Used to emphasize a word or a phrase. |
<Key> |
Keys enclosed in the less-than and greater-than sign |
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means that you must press the enclosed key. |
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Example: <Enter> means that you must press the Enter or |
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Return key. |
<Key1> + <Key2> + <Key3> |
If you must press two or more keys simultaneously, the key |
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names are linked with a plus sign (+). |
v
Package contents
Check your motherboard package for the following items.
Motherboard |
ASUS PRIME B350M-A motherboard |
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Cables |
2 x Serial ATA 6.0 Gb/s cables |
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Accessories |
1 x I/O shield |
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1 x M.2 screw package |
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Application DVD |
1 x Support DVD |
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Documentation |
1 x User Manual |
If any of the above items is damaged or missing, contact your retailer.
PRIME B350M-A specifications summary
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AM4 socket for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors |
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CPU |
Supports CPU up to 8 cores* |
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* Due to CPU limitation, CPU cores supported vary by processor. |
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** Refer to www.asus.com for AMD CPU support list. |
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Chipset |
AMD B350 chipset |
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AMD Ryzen™ processors: |
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4 x DIMMs, max. 64GB, DDR4 2666/2400/2133 MHz, ECC and non-ECC, un- |
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buffered memory |
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Memory |
AMD 7th Generation A-series / Athlon™ processors: |
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4 x DIMMs, max. 64GB, DDR4 2400/2133 MHz, non-ECC un-buffered memory |
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Dual-channel memory architecture |
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* Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List). |
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Integrated AMD Radeon™ R Series Graphics in the 7th Generation A-series |
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processor |
Multi-VGA output support: HDMI, DVI-D and D-Sub ports
Graphics - Supports HDMI 1.4b with maximum resolution of 4096 x 2160 @24Hz / 2560 x 1600 @60Hz
-Supports DVI-D with maximum resolution of 1920 x 1200 @60Hz
-Supports D-Sub with maximum resolution of 1920 x 1200 @60Hz
-Maximum shared memory of 2048 MB
AMD Ryzen™ processors:
1 x PCI Express 3.0/2.0 x16 slot (max. @x16 mode)
Expansion |
AMD 7th Generation A-series / Athlon™ processors: |
slots |
1 x PCI Express 3.0/2.0 x16 slot (max. @x8 mode) |
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AMD B350 Chipset: |
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2 x PCI Express 2.0 x1 slots |
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(continued on the next page) |
vi
PRIME B350M-A specifications summary
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6 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support |
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AMD Ryzen™ processors: |
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- 1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIe 3.0 x4 and |
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SATA modes) storage devices support* |
Storage |
* When a SATA / PCIe mode M.2 device is installed, the M.2 socket shares bandwidth |
with the SATA6G_5/6 ports. |
AMD 7th Generation A-series / Athlon™ processors:
-1 x M.2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x2 and SATA modes) storage devices support*
*When a SATA mode M.2 device is installed, the M.2 socket shares bandwidth with the SATA6G_5/6 ports.
LAN |
Realtek® 8111H Gigabit LAN controller |
Audio |
Realtek® ALC 887-VD2 8-Channel High Definition Audio CODEC |
* Use a chassis with HD audio module in the front panel to support an 8-channel audio |
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output. |
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ASMedia USB 3.1 controllers: |
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- 2 x USB 3.1 ports (2 ports at back) |
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AMD Ryzen™ / 7th Generation A-series / Athlon™ processors |
USB |
- 4 x USB 3.0 ports (4 ports at back panel) |
AMD B350 Chipset:
-2 x USB 3.0/2.0 ports ( 2 ports at mid-board)
-4 x USB 2.0/1.1 ports ( 4 ports at mid-board)
Dependable Stability
ASUS 5X PROTECTION III
-ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
-ASUS LANGuard: Protects against LAN surges, lightning strikes and staticelectricity discharges!
-ASUS Overvoltage Protection: World-class circuit-protecting power design
-ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
-ASUS DIGI+ VRM: 6 Phase digital power design
Superb performance
UEFI BIOS
ASUS unique - Most advanced options with fast response time features
Easy PC DIY
Safe motherboard mounting
-Component-free areas to minimize damage risk
Q-Design
-ASUS Q-DIMM
-ASUS Q-Slot
UEFI BIOS EZ Mode
-featuring friendly graphics user interface
-ASUS CrashFree BIOS 3
-ASUS EZ Flash 3
(continued on the next page)
vii
PRIME B350M-A specifications summary
ASUS Quiet |
Quiet Thermal Design: |
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Thermal |
- Stylish Fanless Design: Chipset Heat-sink solution |
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Solution |
- ASUS Fan Xpert |
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1 x PS/2 keyboard (purple) |
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1 x PS/2 mouse port (green) |
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1 x HDMI port |
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Rear panel I/O |
1 x DVI-D port |
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1 x D-Sub port |
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ports |
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1 x LAN (RJ-45) port |
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2 x USB 3.1 ports |
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4 x USB 3.0/2.0 ports |
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3 x Audio jacks support 8-channel audio output |
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1 x USB 3.0 connector support additional 2 USB 3.0 ports |
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2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports |
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1 x M.2 socket 3 for M Key and type 2242/2260/2280/22110 devices (both SATA |
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& PCIE mode) |
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6 x SATA 6.0Gb/s connectors |
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1 x COM connector |
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1 x CPU Fan connector |
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Internal |
1 x Fan RGB header |
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connectors |
1 x Chassis Fan connector (Support DC & PWM mode) |
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1 x Front panel audio connector |
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1 x 24-pin EATX power connector |
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1 x 8-pin ATX 12V power connector |
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1 x 2-pin Clear CMOS header |
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1 x S/PDIF out connector |
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1 x Speaker connector |
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1 x System panel connector |
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128 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI3.0, WfM2.0, SM BIOS 3.0, |
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BIOS features |
ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, |
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My Favorites, Last Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial |
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Presence Detect) memory information, F6 Qfan Control |
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Manageability |
WfM 2.0, DMI 3.0, WOL by PME, PXE |
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Drivers |
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Support DVD |
ASUS utilities |
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ASUS Update |
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Anti-virus software (OEM version) |
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OS support |
Windows® 10 (64-bit) |
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Form factor |
uATX form factor: 9.6” x 9.45” (24.4 cm x 24 cm) |
Specifications are subject to change without notice.
viii
Product introduction |
1 |
1.1Before you proceed
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.
•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. Failure to do so may cause severe damage to the motherboard, peripherals, or components.
1.2Motherboard overview
Place this side towards the rear of the chassis
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16
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1 |
2 |
KBMS |
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DVI |
VGA |
ATX12V |
HDMI
USB3_56 |
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ASM |
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USB3.1 |
1143 |
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_E12 |
CHA_FAN |
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BATTERY |
LAN_USB3_34 |
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FAN RGB HEADER |
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AUDIO |
LANGuard |
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22110 |
2280 |
Realtek® |
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Realtek |
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8111H |
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8111H |
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Super |
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I/O |
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PCIEX1_1 |
3 |
4 |
2 |
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24cm(9.45in) |
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DIGI |
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+VRM |
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CPU_FAN |
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SOCKET AM4 |
DIMM A1 (64bit, 288-pin module) |
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DDR4 |
128Mb |
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BIOS |
1(SOCKET3)M.2 |
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2260 |
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2242 |
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PCIEX16 |
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AMD®
B350
5
(64bit,288-pin module) |
(64bit, 288-pin module) |
(64bit, 288-pin module) |
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_A2 |
_B1 |
_B2 |
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1 |
DDR4 DIMM |
DDR4 DIMM |
DDR4 DIMM |
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EATXPWR |
24.4cm(9.6in) |
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SATA6G_6 |
6 |
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5 |
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SATA6G_ |
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PRIME B350M-A |
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7 |
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ALC |
PCIEX1_2 |
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CLRTC |
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887 |
SPDIF_OUT |
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SPEAKER |
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COM |
USB34 |
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USB56 |
USB3_12 |
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AAFP |
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F_PANEL |
SATA6G_1 SATA6G_2 SATA6G_5 SATA6G_4 |
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14 |
13 |
12 |
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11 |
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10 |
9 |
8 |
6 |
Unplug the power cord before installing or removing the motherboard. Failure to do so can cause you physical injury and damage motherboard components.
ASUS PRIME B350M-A |
1-1 |
1.2.1Layout contents
Connectors/Jumpers/Slots/LED |
Page |
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1. |
ATX power connectors (24-pin EATXPWR, 8-pin ATX12V) |
1-2 |
2. |
CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) |
1-2 |
3. |
M.2 Socket 3 |
1-3 |
4. |
AMD AM4 CPU socket |
1-3 |
5. |
DDR4 DIMM slots |
1-3 |
6. |
AMD B350 SATA 6.0Gb/s ports (SATA6G_1~6) |
1-3 |
7. |
Clear RTC RAM (2-pin CLRTC) |
1-4 |
8. |
System panel connector (10-1 pin PANEL) |
1-4 |
9. |
Speaker connector (4-pin SPEAKER) |
1-4 |
10. |
USB 3.0 connector (20-1 pin USB3_12) |
1-5 |
11. |
USB 2.0 connectors (10-1 pin USB34,56) |
1-5 |
12. |
Serial port connector (10-1 pin COM) |
1-5 |
13. |
Front panel audio connector (10-1 pin AAFP) |
1-5 |
14. |
Digital audio connector (4-1 pin SPDIF_OUT) |
1-6 |
15. |
PCI Express 2.0 x1 slots |
1-6 |
16. |
PCI Express x16 slot |
1-6 |
17. |
Fan RGB header (4-pin FAN_RGB_HEADER) |
1-7 |
1.ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)
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.
•We recommend that you use an EATX 12V Specification 2.0 compliant power supply unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 8-pin power plugs.
•DO NOT forget to connect the 4-pin/8-pin ATX +12V power plug. Otherwise, the system will not boot up.
•We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices or when you intend to install additional devices. The system may become unstable or may not boot up if the power is inadequate.
•If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus.com/
PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
EATX12V
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GND GND GND GND |
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PIN 1 |
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DC+12V DC+12V DC+12V |
DC+12V |
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EATXPWR |
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+3 Volts |
GND |
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+12 |
Volts |
+5 Volts |
+12 |
Volts |
+5 Volts |
+5V Standby |
+5 Volts |
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Power OK |
-5 Volts |
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GND |
GND |
+5 Volts |
GND |
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GND |
GND |
+5 Volts |
PSON# |
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GND |
GND |
+3 |
Volts |
-12 Volts |
+3 |
Volts |
+3 Volts |
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PIN 1 |
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2.CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector.
1-2 |
Chapter 1: Product introduction |
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.
CHA_FAN
GND
CHA FAN PWR
CHA FAN IN 
CHA FAN PWM
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM
3. M.2 socket 3
These sockets allow you to install M.2 (NGFF) SSD modules. |
M.2(SOCKET3) |
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• This socket supports M Key and 2242/2260/2280/22110 storage devices.
• Due to CPU limitation, M.2 socket supported varies by processor. Refer to the specifications summary table for more details.
4.AMD AM4 CPU socket
This motherboard comes with a AMD AM4 socket designed for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors.
For more details, refer to Central Processing Unit (CPU).
5.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.
6. AMD B350 SATA 6.0Gb/s ports (7-pin SATA6G_1~6)
These ports connect to SATA 6.0 Gb/s hard disk drives via SATA |
SATA6G |
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GND |
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6.0 Gb/s signal cables. |
RSATA_TXP |
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RSATA_TXN |
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GND |
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RSATA_RXN |
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RSATA_RXP |
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GND |
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ASUS PRIME B350M-A |
1-3 |
7.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:
1. Turn OFF the computer and unplug the power cord.
2.Use a metal object such as a screwdriver to short the two pins.
3.Plug the power cord and turn ON the computer.
4.Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data.
CLRTC
+3V_BAT GND
PIN 1
If the steps above do not help, remove the onboard battery and short the two pins again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.
8.System panel connector (10-15 pin PANEL)
This connector supports several chassis-mounted functions.
•System power LED (2-pin PWR_LED)
This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode.
•Hard disk drive activity LED (2-pin HDD_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The HDD LED lights up or flashes when data is read from or written to the HDD.
F_PANEL
+PWR LED 
PWR BTN
_PWR LED_PWRPWRGND LED+-
PIN 1
LED+-GroundHWRST#(NC)
_HDD LED_HDD
+HDD_LED 
RESET
•ATX power button/soft-off button (2-pin PWR_BTN)
This connector is for the system power button.
•Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power.
9.Speaker connector (4-pin SPEAKER)
The 4-pin connector is for the chassis-mounted system warning speaker. SPEAKER
The speaker allows you hear system beeps and warnings.
+5V GND GND Speaker Out
PIN 1
1-4 |
Chapter 1: Product introduction |
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