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,
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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
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Where the applicable license entitles you to the source code of such software and/or other additional data,
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ii
Contents
Safety information ...................................................................................... iv
About this guide ......................................................................................... iv
Package contents ....................................................................................... vi
PRIME B350M-K specications 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 x it by yourself. Contact a qualied 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 qualied service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring 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 nd 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 yers,
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
<Key> Keys enclosed in the less-than and greater-than sign
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key
Used to emphasize a word or a phrase.
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
names are linked with a plus sign (+).
v
Package contents
Check your motherboard package for the following items.
Motherboard
Cables
Accessories
Application DVD
Documentation
ASUS PRIME B350M-K motherboard
2 x Serial ATA 6.0 Gb/s cables
1 x I/O shield
1 x M.2 screw package
1 x Support DVD
1 x User Manual
If any of the above items is damaged or missing, contact your retailer.
PRIME B350M-K specications summary
AM4 socket for AMD Ryzen™ / 7th Generation A-series / Athlon™ processors
CPU
Chipset AMD B350 chipset
Memory
Graphics
Expansion
slots
LAN Realtek
Audio
USB
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.
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
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 (Qualied Vendors List).
Integrated AMD Radeon™ R Series Graphics in the 7th Generation A-series APU
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)
AMD 7th Generation A-series / Athlon™ processors:
1 x PCI Express 3.0/2.0 x16 slot (max. @x8 mode)
AMD B350 Chipset:
2 x PCI Express 2.0 x1 slots
®
8111H Gigabit LAN controller
®
Realtek
ALC 887-VD2 8-Channel High Denition 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)
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 specications 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
ASUS unique
features
ASUS Quiet
Thermal
Solution
Rear panel
I/O ports
- 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: Fortied 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
- Most advanced options with fast response time
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
Quiet Thermal Design:
- Stylish Fanless Design: Chipset Heat-sink solution
- ASUS Fan Xpert
1 x PS/2 keyboard port (purple)
1 x PS/2 mouse port (green)
1 x DVI-D port
1 x D-Sub port
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 specications 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
connectors
BIOS features
Manageability WfM 2.0, DMI 3.0, WOL by PME, PXE
Support DVD
OS support Windows
Form factor
1 x Chassis Fan connector
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,
ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, ASUS CrashFree BIOS 3,
My Favorites, Last Modied log, F12 PrintScreen, ASUS DRAM SPD (Serial
Presence Detect) memory information, F6 Qfan Control
Drivers
ASUS utilities
ASUS Update
Anti-virus software (OEM version)
®
10 (64-bit)
uATX form factor: 8.9” x 8.7” (22.6 cm x 22.1 cm)
viii
Specications are subject to change without notice.
Product introduction
1
1.1 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.
1.2 Motherboard overview
Place this
side towards
the rear of the
chassis
1 42 23
KBMS
DVI
VGA
EATX12V
USB3_56
USB12
LAN_USB3_34
AUDIO
16
15
CHA_FAN
BATTERY
LANGuard
Realtek
8111H
Super
I/O
PCIEX1_1
ALC
887
SPDIF_OUT
AAFP
2280 2260 2242
PCIEX1_2
COM
22.1cm(8.7in)
128Mb
BIOS
PCIEX16
PRIME B350M-K
CLRTC
USB56USB34
10111214 13
USB3_12
DIGI
+VRM
CPU_FAN
1
EATXPWR
SATA6G_3
1
22.6cm(8.9in)
1
5
M.2 (SOCKET3)
SPEAKER
F_PANEL
SOCKET AM4
DDR4 DIMM_A1 (64bit, 288-pin module)
DDR4 DIMM_B1 (64bit,288-pin module)
®
AMD
B350
SATA6G_1 SATA6G_2
SATA6G_4
679 8
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
1.2.1 Layout contents
Connectors/Jumpers/Slots/LED
ATX power connectors (24-pin EATXPWR, 8-pin EATX12V) 1-2
1.
CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) 1-2
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 t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
+5 Volts
+5 Volts
+3 Volts
+3 Volts
EATX12V
GND
PIN 1
+12V DC
EATXPWR
GND
GND
GND
PIN 1
•
We recommend that you use an EATX 12V Specication
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 conguring 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.
Page
GND
GND
+12V DC
+12V DC
GND
+12V DC
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
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
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
CHA_FAN
GND
CHA FAN PWR
CHA FAN IN
CHA FAN PWM
Do not forget to connect the fan cables to the fan
connectors. Insufcient air ow 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.
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.
• 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
specications 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.
ASUS PRIME B350M-K
M.2(SOCKET3)
SATA6G
GND
RSATA_TXP
RSATA_TXN
GND
RSATA_RXN
RSATA_RXP
GND
1-3
7. System panel connector (10-1 pin PANEL)
PIN 1
PWR BTN
PWR_LED+
PWR_LED-
PWR
GND
HDD_LED+
HDD_LED-
Ground
HWRST#
(NC)
F_PANEL
+PWR LED
+HDD_LED RESET
+5V
GND
GND
Speaker Out
SPEAKER
PIN 1
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
ashes when data is read from or written to the HDD.
• 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.
The speaker allows you hear system beeps and warnings.
1-4
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 benets of USB 3.1 Gen 1 including faster
data transfer speeds of up to 5Gbps, faster charging time
for USB-chargeable devices, optimized power efciency
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 specications and support up to 480Mbps
connection speed.
Never connect a 1394 cable to the USB connectors. Doing so
will damage the motherboard!
USB3_12
USB3+5V
IntA_P1_SSRX-
IntA_P1_SSRX+
GND
IntA_P1_SSTX-
IntA_P1_SSTX+
GND
IntA_P1_D-
IntA_P1_D+
GND
GND
IntA_P2_SSTX-
IntA_P2_SSTX+
IntA_P2_SSRX+
GND
IntA_P2_D-
IntA_P2_D+
PIN 1
USB3+5V
IntA_P2_SSRX-
USB34
USB+5V
USB_P3-
USB_P3+
GND
NC
PIN 1
USB+5V
USB_P4-
GND
USB_P4+
Chapter 1: Product introduction
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