ASUS Prime B450M-K Service Manual

PRIME B450M-K

Motherboard

E14215

First Edition

May 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”).

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.

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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

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Legal Compliance Dept.

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Beitou, Taipei 112

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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.

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ii

Contents

Safety information.......................................................................................	iv
About this guide..........................................................................................	iv
Package contents........................................................................................	vi
PRIME B450M-K specifications summary.................................................	vi

Chapter 1:	Product introduction
Before you proceed...................................................................................		1-1
Motherboard overview..............................................................................		1-1
Central Processing Unit (CPU).................................................................		1-7
System memory.........................................................................................		1-9
M.2 Anchor Installation...........................................................................		1-10

Chapter 2:	BIOS information
BIOS setup program.................................................................................		2-1
EZ Mode.....................................................................................................		2-2
Advanced Mode.........................................................................................		2-3
Exit menu...................................................................................................		2-4
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 B450M-K motherboard
	Cables	2 x Serial ATA 6.0 Gb/s cables
	Accessories	1 x I/O shield
		1 x M.2 anchor
	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 B450M-K specifications summary

		AM4 socket for AMD Ryzen™ 2nd Generation / Ryzen™ with Radeon™ Vega
		Graphics / Ryzen™ 1st Generation 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 B450 chipset
		AMD Ryzen™ 2nd Generation /AMD Ryzen™ with Radeon™ Vega Graphics/
		Ryzen™ 1st Generation processors:
		2 x DIMM, max. 32GB, DDR4 3200(O.C.) / 3000(O.C.)/2933(O.C.)/2800(O
	Memory	.C)/2666/2400/2133 MHz, un-buffered memory
		Dual-channel memory architecture
		* Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
		** ECC memory(ECC mode) support varies by CPU.
		Integrated Graphics in the AMD Ryzen™ with Radeon™ Vega Graphics
	Graphics	Multi-VGA output support: DVI-D and D-Sub ports
		- Supports DVI-D output with a maximum resolution of 1920 x 1200 @60Hz
		- Supports D-Sub output with a maximum resolution of 1920 x 1200 @60Hz
		AMD Ryzen™ 2nd Generation / Ryzen™ 1st Generation processors:
		1 x PCI Express 3.0/2.0 x16 slot (max. @x16 mode)
	Expansion	AMD Ryzen™ with Radeon™ Vega Graphics
	slots	1 x PCI Express 3.0/2.0 x16 slot (max. @x8 mode)
		AMD B450 Chipset:
		2 x PCI Express 2.0 x1 slots
		AMD B450 Chipset
		- 4 x Serial ATA 6.0 Gb/s connectors with RAID 0, RAID 1 and RAID 10 support
	Storage	AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/ Ryzen™
		1st Generation processors:
		- 1 x M.2 socket 3 with M Key, Type 2242/2260/2280 (PCIe 3.0 x4 and SATA
		modes) storage devices support
		(continued on the next page)

vi

PRIME B450M-K specifications summary

	LAN	Realtek® 8111H Gigabit LAN controller
		Realtek® ALC 887-VD2 8-Channel High Definition Audio CODEC
		- LED-illuminated design: Brighten up your build with the gorgeous illuminated
		audio trace path.
		- Audio Shielding: Ensures precision analog/digital separation and greatly reduces
		multi-lateral interference
	Audio	- Dedicated audio PCB layers: Separate layers for left and right channels to guard
		the quality of the sensitive audio signals
		- Premium Japanese audio capacitors: Provide warm, natural and immersive
		sound with exceptional clarity and fidelity
		- Supports jack-detection and front panel jack-retasking
		* Use a chassis with HD audio module in the front panel to support an 8-channel audio
		output.
		AMD Ryzen™ 2nd Generation/ Ryzen™ with Radeon™ Vega Graphics/
		Ryzen™ 1st Generation processors:
		-	4 x USB 3.1 Gen 1 (up to 5Gbps) ports (4 ports at back panel)
	USB	AMD B450 Chipset:
		-	2 x USB 3.1 Gen 2 (up to 10Gbps) ports ( 2 ports at back panel)
		-	2 x USB 3.1 Gen 1 (up to 5Gbps) 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
ASUS unique	UEFI BIOS
	- The most advanced options with a 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 a 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	- ASUS Fan Xpert

(continued on the next page)

vii

PRIME B450M-K specifications summary

		1 x PS/2 Keyboard port
		1 x PS/2 Mouse port
		1 x D-Sub port
	Rear panel I/O	1 x DVI-D port
	ports	1 x LAN (RJ-45) port
		2 x USB 3.1 Gen 2 ports
		4 x USB 3.1 Gen 1 ports
		3 x Audio jacks support 8-channel audio output
		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
		4 x SATA 6.0Gb/s connectors
		1 x M.2 socket 3 for M Key and type 2242/2260/2280 devices support(both
		SATA & PCIe mode)
		1 x COM connector
	Internal	1 x CPU Fan connector
		1 x Chassis Fan connector (supports 3-pin DC & 4-pin PWM modes)
	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 System panel connector
		1 x Speaker connector
		1 x S/PDIF out connector
		128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-
	BIOS features	language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3, My Favorite, Last
		Modified log, F12 PrintScreen, ASUS DRAM SPD (Serial Presence Detect)
		memory information, F6 Qfan Control
	Manageability	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’’(22.6cm x 22.1cm)

Specifications are subject to change without notice.

viii

Product introduction	1
Before 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.

•Unplug the power cord before installing or removing the motherboard. Failure to do so can cause you physical injury and damage to motherboard components.

Motherboard overview

Place this side towards the rear of the chassis

	1	2
KBMS
DVI	VGA	EATX12V

U31G1_56

CHA_FAN

U31G2_12

BATTERY

LAN_U31G1_34	LANGuard
		128Mb
		BIOS
AUDIO
Realtek		PCIEX16
8111H

16

Super
I/O	PCIEX1_1

2280 2260

15

ALC

887

PCIEX1_2

3

22.1cm(8.7in)

DIGI +VRM

SOCKET AM4

2242 (SOCKET3) M.2

				SPEAKER
SPDIF_OUT	COM	USB34	USB56	U31G1_12
		CLRTC
AAFP				F_PANEL

2 4

CPU_FAN

A1* (64bit, 288-pin module)

B1* (64bit, 288-pin module)

DDR4DIMM

DDR4DIMM

1

EATXPWR

22.6cm(8.9in)

51

AMD®

B450

SATA6G 4

SATA6G_1 SATA6G_2 SATA6G_3

14	13 12	11	10	9	8	7		6

Scan the QR code to get the detailed pin definitions.

ASUS PRIME B450M-K

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