Asus TUF B450-PLUS GAMING User manual

Motherboard
TUF GAMING
B450-PLUS II
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E17233
First Edition
September 2020
Copyright © 2020 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, modied or altered, unless
such repair, modication 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 identication or explanation and to the
owners’ benet, without intent to infringe.
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Contents
Safety information...................................................................................................... iv
About this guide.......................................................................................................... v
Package contents....................................................................................................... vi
TUF GAMING B450-PLUS II specifications summary ............................................. vi
Connectors with shared bandwidth .......................................................................... x
Chapter 1 Product Introduction
1.1 Before you proceed...................................................................................... 1-1
1.2 Motherboard overview .................................................................................1-1
1.3 Central Processing Unit (CPU).................................................................... 1-8
1.4 System memory............................................................................................ 1-9
Chapter 2 BIOS and RAID Support
2.1 Knowing BIOS...............................................................................................2-1
2.2 BIOS Setup program ....................................................................................2-2
2.3 ASUS EZ Flash 3...........................................................................................2-3
2.4 ASUS CrashFree BIOS 3.............................................................................. 2-4
2.5 RAID configurations..................................................................................... 2-5
Appendix
Notices ..................................................................................................................... A-1
ASUS contact information...................................................................................... A-6
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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 qualied 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 qualied service
technician or your retailer.
• Your motherboard should only be used in environments with ambient temperatures
between 0°C and 40°C.
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About this guide
This user guide contains the information you need when installing and conguring 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 and RAID Support
This chapter tells how to boot into the BIOS, upgrade BIOS using the EZ Flash Utility
and support on RAID.
Where to find more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS website
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.
CAUTION: Information to prevent damage to the components and injuries to
yourself when trying to complete a task.
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
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TUF GAMING B450-PLUS II specifications summary
CPU
AMD Socket AM4 for 3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD
Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega
Graphics Processors*
*Refer to www.asus.com for CPU support list.
Chipset AMD B450 Chipset
Memory
4 x DIMM, Max. 128GB, DDR4 4400(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.
C.)/3600(O.C.)/3533(O.C.)/3466(O.C.)/3400(O.C.)/3200(O.C.)/3000(O.C.
)/2800(O.C.)/2666/2400/2133 MHz Un-buffered Memory*
Dual Channel Memory Architecture
*ECC Memory (ECC mode) support varies by CPU.
*The maximum memory frequency supported varies by processor.
*Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Graphics
Integrated Graphics in the 2nd and 1st Gen AMD Ryzen™ with
Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics
Processors
1 x DisplayPort 1.2
1 x HDMITM 2.0b
*Graphics specifications may vary between CPU types.
Expansion Slots
3rd/2nd/1st Gen AMD Ryzen™ Processors
1 x PCIe 3.0 x16 slot (supports x16 mode)
2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics
Processors
1 x PCIe 3.0 x16 slot (supports x8 mode)
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x PCIe 3.0 x16 slot (supports max. x4 mode)
AMD B450 Chipset
1 x PCIe 2.0 x16 slot (supports x4 mode)*
3 x PCIe 2.0 x1 slots
*When M.2_2 is occupied, PCIe x16_2 will be disabled.
*PCIe x16_2 runs x2 when PCIe x1_1 or PCIe x1_2 is occupied.
Multi-GPU Support Supports AMD 2-Way CrossFireX™ Technology
(continued on the next page)
Package contents
Check your motherboard package for the following items.
Motherboard 1 x TUF GAMING B450-PLUS II motherboard
Cables 2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O Shield
1 x M.2 SSD screw package
1 x TUF Gaming sticker
Application DVD 1 x Support DVD
Documentation 1 x TUF Certication card
1 x User manual
If any of the above items is damaged or missing, contact your retailer.
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TUF GAMING B450-PLUS II specifications summary
Storage
Total supports 2 x M.2 slots and 6 x SATA 6Gb/s ports
3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with
Radeon™ Vega Graphics
1 x M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4
& SATA modes)*
AMD Athlon™ with Radeon™ Vega Graphics Processors
1 x M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports SATA
mode)*
3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with
Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics
Processors
2 x SATA 6Gb/s ports with Raid 0, 1, 10 support
AMD B450 Chipset
1 x M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 2.0 x4
mode)**
4 x SATA 6Gb/s ports with Raid 0, 1, 10 support
*M.2_1 shares bandwidth with SATA6G_56. When M.2_1 is populated, SATA6G_56
will be disabled.
**When M.2_2 is occupied, PCIe x16_2, PCIe x1_1, and PCIe x1_2 will be disabled.
Ethernet 1 x Realtek®L8200A 1Gb Ethernet
TUF LANGuard
USB
Rear USB (Total 8 ports)
2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®)
4 x USB 3.2 Gen 1 ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
Front USB (Total 6 ports)
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Audio
Realtek ALC S1200A 7.1 Surround Sound High Definition Audio
CODEC
- Supports: Jack detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192kHz playback
Audio Features
- Premium Japanese audio capacitors
- Audio Shielding
- Dedicated audio PCB layers
- Audio cover
Back Panel I/O Ports
2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®)
4 x USB 3.2 Gen 1 ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMITM port
1 x Realtek L8200A 1Gb Ethernet port
1 x BIOS FlashBack™ button
5 x Audio jacks
(continued on the next page)
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TUF GAMING B450-PLUS II specifications summary
Internal I/O
Connectors
Fan and cooling related
1 x 4-pin CPU Fan header
3 x 4-pin Chassis Fan headers
1 x 4-pin AIO_PUMP connector
Power related
1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
Storage related
2 x M.2 slots (Key M)
6 x SATA 6Gb/s ports
USB
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Miscellaneous
2 x AURA RGB headers
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (AAFP)
1 x SPI TPM header (14-1 pin)
1 x 10-1 pin System Panel header
Special Features
ASUS TUF PROTECTION
- ASUS DIGI+ VRM
- ASUS Enhanced DRAM Overcurrent Protection
- ASUS ESD Guards
- TUF LANGuard
- ASUS Overvoltage Protection
- ASUS SafeSlot
- ASUS Stainless-Steel Back I/O
ASUS Q-Design
- ASUS Q-DIMM
- ASUS Q-Slot
ASUS Thermal Solution
- Aluminum heatsink design
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
AURA Sync
- AURA RGB headers
(continued on the next page)
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TUF GAMING B450-PLUS II specifications summary
Software
Features
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- AI Noise-Canceling Microphone
AI Suite 3
- Performance And Power Saving Utility
TurboV EVO
EPU
DIGI+ VRM
Fan Xpert 4 core
- EZ update
- PC Cleaner
TUF GAMING CPU-Z
AI Charger
ASUS Turbo LAN
DAEMON Tools
DTS Custom for GAMING Headsets
Norton Anti-virus software (Free Trial for 60 days)
WinRAR
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
BIOS 256 Mb Flash ROM, UEFI AMI BIOS
Manageability WOL by PME, PXE
Operating
System
Windows 10 64-bit
Windows 7 64-bit*
*To support Windows 7 64-bit, please install an AMD Ryzen™ 2nd Generation or
Ryzen™ 1st Generation Processor.
Form Factor ATX Form Factor
12 inch x 9.6 inch (30.5 cm x 24.4 cm)
Specications are subject to change without notice. Refer to the ASUS website for the
latest specications.
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Connectors with shared bandwidth
• When M.2_2 is occupied by an M.2 PCIe SSD, PCIe x16_2, PCIe x1_1, and PCIe
x1_2 will be disabled.
• PCIe x16_2 runs x2 when PCIe x1_1 or PCIe x1_2 is occupied.
• For Conguration A, please adjust BIOS setting for changing onboard device
conguration.
• M.2_1 shares bandwidth with SATA6G_56. When M.2_1 is populated, SATA6G_56
will be disabled.
Configuration 1 (Auto) 2 3
A
PCIEX16_2 -PCIe 2.0 x2 PCIe 2.0 x4
PCIEX1_1 -PCIe 2.0 x1 -
PCIEX1_2 -PCIe 2.0 x1 -
M.2_2 PCIe 2.0 x4 - -
Configuration 1 2
BM.2_1 PCIe 3.0 x4 / SATA -
SATA6G_56 -V
DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2* (64bit, 288-pin module) DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2* (64bit, 288-pin module)
DIGI+
VRM
AIO_PUMP
CHA_FAN3
CHA_FAN1
CPU_FAN
CHA_FAN2
M.2_1(SOCKET3)
RGB_HEADER2 RGB_HEADER1
COM_DEBUG
COM PANEL
AAFP CLRTC
256Mb
BIOS
SATA6G_5SATA6G_6
EATX12V
EATXPWR
U32G1_12
BATTERY
HDMI
_DP
PCIEX1_1
Super
I/O
2280
TPM
2260 2242
M.2_2(SOCKET3)
2280
22110
2260 2242
PCIEX1_2
PCIEX1_3
PCIEX16_2
PCIEX16_1
USB56 USB34
U2_12U32G1_56
LAN_U32G1_78
SOCKET AM4
FLBK_LED1
BIOS_FLBK
U32G2_C4
U32G2_3
AMD
B450
AUDIO
Realtek®
L8200A
B
B
B
A
A
A
A
SATA6G_4 SATA6G_3
SATA6G_2 SATA6G_1
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ASUS TUF GAMING B450-PLUS II
1-1
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.
Unplug the power cord before installing or removing the motherboard. Failure to do so can
cause you physical injury and damage motherboard components.
1.2 Motherboard overview
Place this
side towards
the rear of the
chassis
DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2* (64bit, 288-pin module) DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2* (64bit, 288-pin module)
DIGI+
VRM
AIO_PUMP
CHA_FAN3
CHA_FAN1
CPU_FAN
CHA_FAN2
M.2_1(SOCKET3)
RGB_HEADER2 RGB_HEADER1
COM_DEBUG
COM PANEL
AAFP CLRTC
256Mb
BIOS
SATA6G_5SATA6G_6
SATA6G_4 SATA6G_3
SATA6G_2 SATA6G_1
EATX12V
EATXPWR
U32G1_12
BATTERY
HDMI
_DP
PCIEX1_1
Super
I/O
2280
TPM
2260 2242
M.2_2(SOCKET3)
2280
22110
2260 2242
PCIEX1_2
PCIEX1_3
PCIEX16_2
PCIEX16_1
USB56 USB34
U2_12U32G1_56
LAN_U32G1_78
SOCKET AM4
FLBK_LED1
BIOS_FLBK
U32G2_C4
U32G2_3
AMD
B450
24.4cm(9.6in)
30.5cm(12in)
AUDIO
Realtek®
L8200A
7
4
6
5
10
10
11 1213
3
214 14
4
158
6
16
5
79
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1-2
Chapter 1: Product Introduction
1.2.1 Layout contents
1. CPU socket
The motherboard comes with an AMD Socket AM4 designed for 3rd/2nd/1st Gen AMD
Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega Graphics/ Athlon™ with
Radeon™ Vega Graphics Processors.
For more details, refer to Central Processing Unit (CPU).
2. DDR4 DIMM slots
The motherboard comes with Dual Inline Memory Modules (DIMM) slots designed for DDR4
(Double Data Rate 4) memory modules.
For more details, refer to System memory.
3. Expansion slots
This motherboard supports two PCIe x16 graphics cards and three PCIe 2.0 x1 network
cards, SCSI cards and other cards that comply with the PCI Express specication. Please
refer to the following table for the Hyper M.2 conguration.
Hyper M.2 x16 series card configuration
• Hyper M.2 X16 series cards are sold separately.
• When using 3rd2nd/1st Gen AMD Ryzen™ Processors and a Hyper M.2 X16 series card
with 4 M.2 SSDs, if you wish to connect a display, we suggest installing a VGA card to
PCIe X16_2, which will run at x4.
• Set PCIeX16_1 to [PCIe RAID Mode] under BIOS settings to enable the Hyper M.2
X16 series card.
4. Fan headers
The Fan headers allow you to connect fans to cool the system.
Header Max.
Current
Max.
Power Default Speed Shared Control
CPU_FAN 1A 12W Q-Fan Controlled A
CHA_FAN1 1A 12W Q-Fan Controlled -
CHA_FAN2 1A 12W Q-Fan Controlled -
CHA_FAN3 1A 12W Q-Fan Controlled -
AIO_PUMP 1A 12W Q-Fan Controlled -
5. Power connectors
These Power connectors allow you to connect your motherboard to a power supply. The
power supply plugs are designed to t in only one orientation. Find the proper orientation and
push down rmly until the power supply plugs are fully inserted.
FAN PWM
FAN IN
FAN PWR
GND
GND
FAN PWR
FAN IN
FAN PWM
Slot PCIe bifurcation settings in PCIe x16 slots with different Ryzen™ CPUs
PCIeX16_1
3rd/2nd/1st Gen AMD Ryzen™ Processors (Support PCIe Gen 3 SSDs)
Supported SSDs
4
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ASUS TUF GAMING B450-PLUS II
1-3
Ensure to connect the 8-pin power plug.
• For a fully congured system, we recommend that you use a power supply unit
(PSU) that complies with ATX 12V Specication 2.0 (or later version) and provides a
minimum power of 350W.
• We recommend that you use a PSU with a higher power output when conguring a
system with more power-consuming 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, we
recommend you to refer to online resources for Power Supply Wattage Calculator.
6. M.2 Slots (Key M)
The M.2 slots allow you to install M.2 devices such as M.2 SSD modules.
• For 3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with Radeon™ Vega
Graphics, M.2_1 slot supports PCIe 3.0 x4 and SATA modes M Key design and type
2242/2260/2280/22110 storage devices.
• For AMD Athlon™ with Radeon™ Vega Graphics Processors, M.2_1 slot supports
SATA mode M Key design and type 2242/2260/2280/22110 storage devices.
• For AMD B450 chipset, M.2_2 slot supports PCIe 2.0 x4 and SATA modes M Key
design and type 2242/2260/2280 storage devices.
• M.2_1 shares bandwidth with SATA6G_56. When M.2_1 is populated, SATA6G_56
will be disabled.
• When M.2_2 is occupied, PCIe x16_2, PCIe x1_1, and PCIe x1_2 will be disabled.
7. SATA 6Gb/s ports
The SATA 6Gb/s ports allow you to connect SATA devices such as optical disc drives and
hard disk drives via a SATA cable.
8. USB 3.2 Gen 1 header
The USB 3.2 Gen 1 header allows you to connect a USB 3.2 Gen 1
module for additional USB 3.2 Gen 1 ports. The USB 3.2 Gen 1 header
provides data transfer speeds of up to 5Gb/s.
The USB 3.2 Gen 1 module is purchased separately.
9. USB 2.0 headers
The USB 2.0 headers allow you to connect a USB module for additional USB
2.0 ports. The USB 2.0 headers provide data transfer speeds of up to 480Mb/s.
DO NOT connect a 1394 cable to the USB connectors. Doing so will
damage the motherboard!
The USB 2.0 module is purchased separately.
PIN 1
GND
IntA_P1_D+
IntA_P1_D-
GND
IntA_P1_SSTX+
IntA_P1_SSTX-
GND
IntA_P1_SSRX+
IntA_P1_SSRX-
USB3+5V
IntA_P2_D+ IntA_P2_D- GND IntA_P2_SSTX+ IntA_P2_SSTX- GND IntA_P2_SSRX+ IntA_P2_SSRX- USB3+5V
USB+5V USB_P5- USB_P5+ GND NC
USB+5V
USB_P6-
USB_P6+
GND
PIN 1
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1-4
Chapter 1: Product Introduction
10. AURA RGB headers
The RGB headers allow you to connect RGB LED strips.
The RGB headers support 5050 RGB multi-color LED strips (12V/G/R/B),
with a maximum power rating of 3A (12V), and no longer than 3m.
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.
• Actual lighting and color will vary with LED strip.
• If your LED strip does not light up, check if the RGB LED extension cable and the
RGB LED strip are connected in the correct orientation, and the 12V connector is
aligned with the 12V header on the motherboard.
• The LED strip will only light up when the system is powered on.
• The LED strip is purchased separately.
11. Clear CMOS header
This header allows you to clear the CMOS RTC RAM data of the system setup
information such as date, time, and 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.
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.
12. COM Port header
This header is for a serial (COM) port. Connect the serial port module cable to
this header, then install the module to a slot opening at the back of the system
chassis.
13. Front panel audio header
This header is for a chassis-mounted front panel audio I/O module that
supports HD audio standard. Connect one end of the front panel audio I/O
module cable to this header.
• We recommend that you connect a high-denition front panel
audio module to this header to avail of the motherboard’s high-
denition audio capability.
• If you want to connect a high-denition front panel audio module
to this header, set the Front Panel Type item in the BIOS setup
to [HD Audio]. By default, this header is set to [HD Audio].
CLRTC
+3V_BAT GND
PIN 1
PIN 1
COM
DCD
TXD
GND
RTS
RI
RXD
DTR
DSR
CTS
AAFP
A_GND NC A_JD_FMIC1 A_JD_HPOUT
A_FMIC1_L
A_FMIC1_R
A_HPOUT_R
A_JD_FRONT
A_HPOUT_L
HD-audio-compliant
pin definition
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ASUS TUF GAMING B450-PLUS II
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14. SPI TPM header
This header supports a Trusted Platform Module
(TPM) system with a Serial Peripheral Interface (SPI),
allowing you to securely store keys, digital certicates,
passwords, and data. A TPM system also helps
enhance network security, protects digital identities,
and ensures platform integrity.
15. 20-5 pin System Panel header
This connector supports several chassis-mounted functions.
• System power LED (4-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.
• System warning speaker (4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
• ATX power button/soft-off button (2-pin PWR_SW)
This connector is for the system power button. Pressing the power button turns the
system on or puts the system in sleep or soft-off mode depending on the operating
system settings. Pressing the power switch for more than four seconds while the
system is ON turns the system OFF.
• 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.
16. BIOS Flashback™LED
The FlashBack™ LED lights up or blinks to indicate the status of the BIOS
FlashBack™.
Scan the QR code for more information on BIOS FlashBack™
function.
TPM
PIN 1
S_SPI_TPM_IRQ#
S_SPI_TPM_CS2#
F_BIOS_WP#_R
GND
T_SPI_CLK
T_SPI_MOSI
VCCSPI
S_PLTRST#
NC
+1.8V_SPI
F_SPI_CS0#_R
T_SPI_MISO
F_SPI_HOLD#_R
PLED+ PLED- PWR Ground +5V_SPKO Ground Ground Speaker
HDD_LED+
HDD_LED-
Ground
RESET
NC
PLED+
PLED-
PIN 1
+PWR_LED-
+PWR_LED-
SPEAKER
PANEL
+HDD_LED-
PWR_SW
RESET
* Requires an ATX power supply
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Chapter 1: Product Introduction
1.2.2 Rear panel connectors
1. Ethernet port. This port allows Gigabit connection to a Local Area Network (LAN)
through a network hub. Refer to the table below for the Ethernet port LED indications.
Ethernet port LED indications
2. USB 3.2 Gen 2 (up to 10Gbps) port (teal blue, Type A). This 9-pin Universal Serial
Bus 3.2 (USB 3.2) port is for USB 3.2 Gen 2 devices.
3. DisplayPort. This port is for a DisplayPort-compatible device.
4. USB 2.0 ports. These 4-pin Universal Serial Bus (USB) ports are for USB 2.0 devices.
5. Center / Subwoofer port (orange). This port connects the center/subwoofer speakers.
6. Rear Speaker Out port (black). This port connects the rear speakers in a 4 channel,
5.1 channel, or 7.1 channel audio conguration.
7. Line In port (light blue). This port connects the tape, CD, DVD player, or other audio
sources.
8. BIOS FlashBackTM button. Press the BIOS FlashBackTM button for three seconds until
the FlashBackTM LED blinks three times, indicating that the BIOS FlashBackTM function
is enabled.
9. USB 3.2 Gen 1 (up to 5Gbps) ports. These 9-pin Universal Serial Bus (USB) ports
connect to USB 3.2 Gen 1 devices.
10. USB 3.2 Gen 2 (up to 10Gbps) port (USB Type-C®). This 9-pin Universal Serial Bus
3.2 (USB 3.2) port is for USB 3.2 Gen 2 Type-C®devices.
11. HDMITM port. This port is for a High-Denition Multimedia Interface (HDMITM)
connector, and is HDCP compliant allowing playback of HD DVD, Blu-ray, and other
protected content.
12 13 14118 109
3 5 6 71 2 4
9
Speed
LED
Activity Link
LED
Ethernet port
Activity/Link LED Speed LED
Status Description Status Description
Off No link Off 10Mbps connection
Orange Linked Orange 100Mbps connection
Orange (Blinking) Data activity Green 1Gbps connection
Orange (Blinking
then steady)
Ready to wake
up from S5 mode
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ASUS TUF GAMING B450-PLUS II
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12. Optical S/PDIF Out port. This port connects to the optical S/PDIF devices.
13. Microphone port (pink). This port connects a microphone.
14. Line Out port (lime). This port connects a headphone or a speaker. In 4-channel,
5.1-channel, and 7.1-channel congurations, the function of this port becomes Front
Speaker Out.
Refer to the audio conguration table below for the function of the audio ports in 2, 4, 5.1,
or 7.1-channel conguration.
Audio 2, 4, 5.1 or 7.1-channel configuration
Port Headset
2-channel 4-channel 5.1-channel 7.1-channel
Light Blue Line In Line In Line In Side Speaker Out
Lime Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Mic In Mic In
Orange – – Center/Subwoofer Center/Subwoofer
Black – Rear Speaker Out Rear Speaker Out Rear Speaker Out
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Chapter 1: Product Introduction
1.3 Central Processing Unit (CPU)
This motherboard comes with an AMD Socket AM4 designed for
3rd/2nd/1st Gen AMD Ryzen™/ 2nd and 1st Gen AMD Ryzen™ with
Radeon™ Vega Graphics/ Athlon™ with Radeon™ Vega Graphics
Processors.
Unplug all power cables before installing the CPU.
The AM4 socket has a different pinout design. Ensure that you use a CPU designed for the
AM4 socket. The CPU ts in only one correct orientation. DO NOT force the CPU into the
socket to prevent bending the connectors on the socket and damaging the CPU!
Installing the CPU
Apply the Thermal Interface Material to the CPU heatsink and CPU before you install the
heatsink and fan if necessary.
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ASUS TUF GAMING B450-PLUS II
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1.4 System memory
This motherboard comes with four Double Data Rate 4 (DDR4) Dual Inline Memory Module
(DIMM) sockets. The gure illustrates the location of the DDR4 DIMM sockets:
Channel Sockets
Channel A DIMM_A1 & DIMM_A2*
Channel B DIMM_B1 & DIMM_B2*
DIMM_A2*
DIMM_A1
DIMM_B2*
DIMM_B1
• 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 conguration. Any
excess memory from the higher-sized channel is then mapped for single-channel
operation.
• Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
• A DDR4 memory module is notched differently from a DDR, DDR2, or DDR3 module.
DO NOT install a DDR, DDR2, or DDR3 memory module to the DDR4 slot.
• The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value.
• For system stability, use a more efcient memory cooling system to support a full
memory load.
• Refer to www.asus.com for the latest Memory QVL (Qualied Vendors Lists).
Recommended memory configurations
DIMM_B2*
DIMM_A1
DIMM_A2*
DIMM_B2*
DIMM_A2*
DIMM_B1
DIMM_B2*
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Chapter 1: Product Introduction
To remove a DIMM
B
A
Installing a DIMM
1 2
B
A
A
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