ASUS Prime B350M-K Service Manual

PRIME B350M-K

Motherboard

E12609

First Edition

February 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 [e-mail], 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-K specifications summary.................................................	vi

Chapter 1 :		Product introduction
1.1	Before you proceed......................................................................		1-1
1.2	Motherboard overview.................................................................		1-1
1.3	Central Processing Unit (CPU)..................................................		1-10
1.4	System memory..........................................................................		1-12

Chapter 2 :		BIOS information
2.1	Managing and updating your BIOS		............................................. 2-1
2.2	BIOS setup program.....................................................................		2-5
2.3	Exit menu.....................................................................................		2-10
Appendix
Notices.......................................................................................................			A-1
ASUS contact information........................................................................			A-5

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
	means that you must press the enclosed key.
	Example: <Enter> means that you must press the Enter or
	Return key.
<Key1> + <Key2> + <Key3>	If you must press two or more keys simultaneously, the key
	names are linked with a plus sign (+).

v

Package contents

Check your motherboard package for the following items.

	Motherboard	ASUS PRIME B350M-K 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 B350M-K specifications summary

		AM4 socket for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors
	CPU	Supports CPU up to 8 cores*
		* Due to CPU limitation, CPU cores supported vary by processor.
		** Refer to www.asus.com for AMD CPU support list.
	Chipset	AMD B350 chipset
		AMD Ryzen™ processors:
		2 x DIMMs, max. 32GB, DDR4 3200(O.C.)/2933(O.C.)/2666/2400/2133 MHz, ECC
		and non-ECC, un-buffered memory
	Memory	AMD 7th Generation A-series / Athlon™ processors:
		2 x DIMMs, max. 32GB, DDR4 2400/2133 MHz, non-ECC un-buffered memory
		Dual-channel memory architecture
		* Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
		Integrated AMD Radeon™ R Series Graphics in the 7th Generation A-series APU
	Graphics	Multi-VGA output support: DVI-D, and D-Sub ports
		- 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)
		AMD B350 Chipset:
		2 x PCI Express 2.0 x1 slots
	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
		output.
		AMD Ryzen™ / 7th Generation A-series / Athlon™ processors
		- 4 x USB 3.1 Gen 1 ports (4 ports at back panel)
	USB	AMD B350 Chipset:
		- 2 x USB 3.1 Gen 1 ports ( 2 ports at mid-board)
		- 6 x USB 2.0/1.1 ports ( 2 ports at back panel, 4 ports at mid-board)
		(continued on the next page)

vi

PRIME B350M-K specifications summary

AMD B350 Chipset

- 4 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support

AMD Ryzen™ processors:

Storage - 1 x M.2 socket 3 with M Key, Type 2242/2260/2280 (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 (SATA modes) storage devices support

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
	ASUS Quiet	Quiet Thermal Design:
	Thermal	- Stylish Fanless Design: Chipset Heat-sink solution
	Solution	- ASUS Fan Xpert
		1 x PS/2 keyboard port (purple)
		1 x PS/2 mouse port (green)
		1 x DVI-D port
	Rear panel	1 x D-Sub port
	I/O ports	1 x LAN (RJ-45) port
		2 x USB 2.0/1.1 ports
		4 x USB 3.1 Gen 1 ports
		3 x Audio jacks support 8-channel audio output
		(continued on the next page)

vii

PRIME B350M-K specifications summary

		1 x USB 3.1 Gen 1 connector supports 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.2 socket 3 for M Key and type 2242/2260/2280 devices
		4 x SATA 6.0Gb/s connectors
		1 x COM connector
		1 x CPU Fan connector
	Internal	1 x Chassis Fan connector
	connectors	1 x Front panel audio connector
		1 x 24-pin EATX power connector
		1 x 8-pin EATX 12V power connector
		1 x 2-pin Clear CMOS header
		1 x S/PDIF out connector
		1 x Speaker connector
		1 x System panel connector
		128 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI3.0, WfM2.0, SM BIOS 3.0,
	BIOS features	ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3,
		My Favorites, Last Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial
		Presence Detect) memory information, F6 Qfan Control
	Manageability	WfM 2.0, DMI 3.0, WOL by PME, PXE
		Drivers
	Support DVD	ASUS utilities
		ASUS Update
		Anti-virus software (OEM version)
	OS support	Windows® 10 (64-bit)
	Form factor	uATX form factor: 8.9” x 8.7” (22.6 cm x 22.1 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

1 2

KBMS
DVI	VGA
	EATX12V

USB3_56

USB12	CHA_FAN
	BATTERY
LAN_USB3_34
AUDIO	LANGuard
16	Realtek
	8111H
	Super
	I/O
	PCIEX1_1
15	2280
ALC
887	PCIEX1_2
	SPDIF_OUT
	COM
	AAFP

3	2	4
22.1cm(8.7in)
DIGI
+VRM
	CPU_FAN
AM4	(64bit, 288-pin module)	(64bit,288-pin module)	EATXPWR	22.6cm(8.9in)
SOCKET	DDR4DIMM A1	DDR4DIMM B1
				1
128Mb
BIOS

	PCIEX16
	PRIME B350M-K			51
			(SOCKET3)
	2260	2242		AMD®
			M.2	B350
			SPEAKER	SATA6G_4
	CLRTC USB34	USB56 USB3_12
			F_PANEL	SATA6G_1 SATA6G_2 SATA6G_3

14

13 12

11

10

9

8

7

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-K

1-1

1.2.1Layout 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_FAN)	1-2
3.	AMD AM4 CPU socket	1-3
4.	DDR4 DIMM slots	1-3
5.	M.2 Socket 3	1-3
6.	AMD B350 SATA 6.0Gb/s ports (SATA6G_1~4)	1-3
7.	System panel connector (10-1 pin PANEL)	1-4
8.	Speaker connector (4-pin SPEAKER)	1-4
9.	USB 3.1 Gen 1 connector (20-1 pin USB3_12)	1-4
10.	USB 2.0 connectors (10-1 pin USB34,56)	1-4
11. Clear RTC RAM (2-pin CLRTC)		1-5
12.	Serial port connector (10-1 pin COM)	1-5
13.	Digital audio connector (4-1 pin SPDIF_OUT)	1-5
14.	Front panel audio connector (10-1 pin AAFP)	1-5
15.	PCI Express 2.0 x1 slots	1-6
16.	PCI Express 3.0/ 2.0 x16 slot	1-6

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

	GND GND GND GND
	PIN 1
	DC+12V DC+12V DC+12V	DC+12V
	EATXPWR
+3 Volts		GND
+12	Volts	+5 Volts
+12	Volts	+5 Volts
+5V Standby		+5 Volts
Power OK		-5 Volts
	GND	GND
+5 Volts		GND
	GND	GND
+5 Volts		PSON#
	GND	GND
+3	Volts	-12 Volts
+3	Volts	+3 Volts
	PIN 1

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.AMD AM4 CPU socket

This motherboard comes with an AMD AM4 socket designed for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors.

For more details, refer to Central Processing Unit (CPU).

4.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.

5. M.2 socket 3

This socket allows you to install M.2 (NGFF) SSD modules.		M.2(SOCKET3)

• This socket supports M Key and 2242/2260/2280 storage devices.

• Due to CPU limitation, M.2 socket supported varies by processor. Refer to the specifications summary table for more details.

6.AMD B350 SATA 6.0Gb/s ports (7-pin SATA6G_1~4)

These ports connect to SATA 6.0 Gb/s hard disk drives via SATA 6.0 Gb/s signal cables.

SATA6G

GND

RSATA_TXP

RSATA_TXN

GND

RSATA_RXN

RSATA_RXP

GND

ASUS PRIME B350M-K

1-3

7.System panel connector (10-1 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.

8.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

9.USB 3.1 Gen1 connector (20-1 pin USB3_12)

This connector allows you to connect a USB 3.1 Gen 1 module for additional USB 3.1 Gen 1 front or rear panel ports. With an installed USB 3.1 Gen 1 module, you can enjoy all the benefits of USB 3.1 Gen 1 including faster data transfer speeds of up to 5Gbps, faster charging time for USB-chargeable devices, optimized power efficiency and backward compatibility with USB 2.0.

10.USB 2.0 connectors (10-1 pin USB3~6)

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 specifications and support up to 480Mbps connection speed.

Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!

USB3_12

P1_IntA P1_IntAGNDP1_IntA P1_IntAGNDP1_IntA P1_IntAGND USB3+5V____D__ SSRXSSTX-D+ -SSRX+-SSTX+

PIN 1

_IntA_IntA _IntA_IntA _P2_P2 _P2_P2 P2_IntA P2_IntA SSRXSSTXD__ USB3+5V-SSRX+GND-SSTX+GND-D+

USB34

		USB+5V USB_P3USB_P3+				GND NC
PIN 1		USB+5V USB P4USB P4+				GND

1-4	Chapter 1: Product introduction