Asrock B660M Pro RS/AX Quick Installation Guide

Version 1.0
Published April 2022

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IMPORTANT - READ BEFORE COPYING, INSTALLING OR USING.

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CALIFORNIA, USA ONLY

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“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
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DO NOT throw the motherboard in municipal waste. is product has been
designed to enable proper reuse of parts and recycling. is symbol of the
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for disposal of electronic products.

CE Warning

is device complies with directive 2014/53/EU issued by the Commision of the
European Community.

is equipment complies with EU radiation exposure limits set forth for an
uncontrolled environment.
is equipment should be installed and operated with minimum distance 20cm
between the radiator & your body.

Operations in the 5.15-5.35GHz band are restricted to indoor usage only.

Radio transmit power per transceiver type

Function Frequency Maximum Output Power (EIRP)

2400-2483.5 MHz 18.5 + / -1.5 dbm

5150-5250 MHz 21.5 + / -1.5 dbm

WiFi

Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm

5250-5350 MHz

5470-5725 MHz

18.5 + / -1.5 dbm (no TPC)

21.5 + / -1.5 dbm (TPC)

25.5 + / -1.5 dbm (no TPC)

28.5 + / -1.5 dbm (TPC)

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B660M Pro RS/AX

Motherboard Layout

Intel

B660

ATXP WR 1

HDLED RESET

PLED PWRBTN

PANEL1

1

1

1

2

CPU_FAN1

3

1

PCIE1

1

DDR4 _A2 (64 b it, 288 -pin mo dule)

DDR4 _A1 (64 b it, 288 -pin mo dule)

DDR4 _B2 (64 b it, 288 -pin mo dule)

DDR4 _B1 (64 b it, 288 -pin mo dule)

6

ATX12V1

USB3_5_ 6

CLRMOS1

1

1

HD_AUDIO1

Top:
RJ-45

CHA_FAN1/WP

PCIE3

8

9

4

USB_5_6

1

23

PCIE2

28

USB 3.2 Gen1
T: USB3_4
B: USB3_3

Top:

LINE I N

Cent er:

FRON T

Bott om:

MIC IN

USB2. 0

T: USB_1

B: USB _2

PS2

Keybo ard

/Mous e

1

ADDR_LED3

7

1

SPI_TPM_J1

T B1

1

ADDR_LED1

1

RGB_LED1

1

CHA_FAN3/WP

22

26

USB_3_4

CPU_FAN2/WP

11

12

SATA3_0

M2_2

USB 3.2 Gen1
T:

USB3_2

B:

USB3_1

13

14

19

18

16

27

M2_1

CMOS

Battery

5

SATA3_2

SATA3_3

F_USB 3_T C_1

10

SATA3_1

15

BIOS
ROM

24

CHA_FAN2/WP

21

SPK_CI1

1

20

HDMI 1

LAN

AUDIO
CODEC

DRAM

CPU

VGA

BOOT

1

ADDR_LED2

17

DP1

25

M2_W IFI1

WiFi-802.11ax

Module

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English

No. Description

1 ATX 12V Power Connector (ATX12V1)

2 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)

3 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)

4 CPU Fan Connector (CPU_FAN1)

5 CPU/Water Pump Fan Connector (CPU_FAN2/WP)

6 Addressable LED Header (ADDR_LED2)

7 Addressable LED Header (ADDR_LED3)

8 ATX Power Connector (ATXPWR1)

9 USB 3.2 Gen1 Header (USB3_5_6)

10 Front Panel Type C USB 3.2 Gen1 Header (F_USB3_TC_1)

11 SATA3 Connector (SATA3_3)(Lower)

12 SATA3 Connector (SATA3_2)(Upper)

13 System Panel Header (PANEL1)

14 SATA3 Connector (SATA3_0)

15 SATA3 Connector (SATA3_1)

16 SPI TPM Header (SPI_TPM_J1)

17 Post Status Checker (PSC)

18 USB 2.0 Header (USB_5_6)

19 USB 2.0 Header (USB_3_4)

20 Chassis Intrusion and Speaker Header (SPK_CI1)

21 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)

22 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)

23 5-pin underbolt AIC Connector (TB1)

24 Clear CMOS Jumper (CLRMOS1)

25 Addressable LED Header (ADDR_LED1)

26 RGB LED Header (RGB_LED1)

27 Front Panel Audio Header (HD_AUDIO1)

28 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)

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B660M Pro RS/AX

I/O Panel

1

3

42

11

10

78

No. Description No. Description

1 USB 2.0 Ports (USB_12) 7 USB 3.2 Gen1 Ports (USB3_1_2)

2 LAN RJ-45 Port* 8 Antenna Ports

3 Line In (Light Blue)** 9 DisplayPort 1.4

4 Front Speaker (Lime)** 10 HDMI Port

5 Microphone (Pink)** 11 PS/2 Mouse/Keyboard Port

6 USB 3.2 Gen1 Ports (USB3_3_4)

* ere are two LEDs on the LAN port. Please refer to the table below for the LAN port LED indications.

ACT/LINK LED

SPEED LED

LAN Por t

Activity / Link LED Speed LED

Status Description Status Description

O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection

** Function of the Audio Ports in 7.1-channel Conguration:

569

Port Function

Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out

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802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz
Antennas

802.11ax Wi-Fi 6E + BT Module

is motherboard comes with an exclusive 802.11 a/b/g/n/ax Wi-Fi 6E + BT module
that oers support for 802.11 a/b/g/n/ax Wi-Fi 6E connectivity standards and
Bluetooth. Wi-Fi 6E + BT module is an easy-to-use wireless local area network
(WLAN) adapter to support Wi-Fi 6E + BT. Bluetooth standard features Smart
Ready technology that adds a whole new class of functionality into the mobile
devices. BT also includes Low Energy Technology and ensures extraordinary low
power consumption for PCs.

* e transmission speed may vary according to the environment.

* Wi-Fi 6E (6GHz band) will be supported by Microso® Windows® 11. e availability will
depend on the dierent regulation status of each country and region. It will be activated (for
supported countries) through Windows Update and soware updates once available.
* A 6GHz compatible router is required for 6E functionality.

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English

B660M Pro RS/AX

WiFi Antennas Installation Guide

Step 1

Prepare the WiFi 2.4/5/6 GHz Antennas that
come with the package.

Step 2

Connect the two WiFi 2.4/5/6 GHz Antennas
to the antenna connectors. Turn the antenna
clockwise until it is securely connected.

Step 3

Set the WiFi 2.4/5/6 GHz Antenna as shown in
the illustration.

*You may need to adjust the direction of
the antenna for a stronger signal.

5

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Chapter 1 Introduction

ank you for purchasing ASRock B660M Pro RS/AX motherboard, a reliable
motherboard produced under ASRock’s consistently stringent quality control.
It delivers excellent performance with robust design conforming to ASRock’s
commitment to quality and endurance.

Becau se the motherboard specications and the BIOS soware might be updated, the
content of this documentation will be subject to change without notice. In case any
modications of this documentation occur, the updated version will be available on
ASRock’s website without further notice. If you require technical support related to
this motherboard, please vi sit our website for s pecic information about the model
you are using. You may nd the l atest VGA cards and CPU suppor t list on ASRock’s
website a s well. ASRock website http://www.asrock.com.

1.1 Package Contents

ASRock B660M Pro RS/AX Motherboard (Micro ATX Form Factor)

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ASRock B660M Pro RS/AX Quick Installation Guide

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ASRock B660M Pro RS/AX Support CD

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2 x Serial ATA (SATA) Data Cables (Optional)

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2 x ASRock WiFi 2.4/5/6 GHz Antennas (Optional)

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2 x Screws for M.2 Sockets (Optional)

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1 x Stando for M.2 Socket (Optional)

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1 x I/O Panel Shield

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English

B660M Pro RS/AX

1.2 Specications

Platform

CPU

Chipset

Memory

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* Supports DDR4 3200 natively.
* Please refer to Memory Support List on ASRock's website for
more information. (http://www.asrock.com/)

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Micro ATX Form Factor
Solid Capacitor design

th

Supports 12
Digi Power design
8 Power Phase design
Supports Intel® Hybrid Technology
Supports Intel® Turbo Boost Max 3.0 Technology

Intel® B660

Dual Channel DDR4 Memory Technology
4 x DDR4 DIMM Slots
Supports DDR4 non-ECC, un-buered memory up to
5333+(OC)*

Supports ECC UDIMM memory modules (operate in non­ECC mode)
Max. capacity of system memory: 128GB
Supports Intel® Extreme Memory Prole (XMP) 2.0

Gen Intel® CoreTM Processors (LGA1700)

Expansion
Slot

Graphics

Chipset:

1 x PCIe 4.0 x16 Slot (PCIE1), supports x16 mode*

•

1 x PCIe 3.0 x16 Slot (PCIE3), supports x4 mode*

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1 x PCIe 3.0 x1 Slot (PCIE2)*

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1 x M.2 Socket (Key E), supports type 2230 WiFi/BT PCIe

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WiFi module and Intel® CNVi (Integrated WiFi/BT)

* Supports NVMe SSD as boot disks

Supports AMD CrossFireTM

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Intel® UHD Graphics Built-in Visuals and the VGA outputs

•

can be supported only with processors which are GPU
integrated.

e

Graphics Architecture (Gen 12)

Intel® X

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Dual graphics output: support HDMI and DisplayPort 1.4

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ports by independent display controllers

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English

Audio

LAN

Wireless

LAN

Supports HDMI 2.1 TMDS Compatible with max. resolution

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up to 4K x 2K (4096x2160) @ 60Hz
Supports DisplayPort 1.4 with DSC (compressed) max.

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resolution up to 8K (7680x4320) @ 60Hz / 5K (5120x3200) @
120Hz
Supports HDCP 2.3 with HDMI 2.1 TMDS Compatible and

•

DisplayPort 1.4 Ports

7.1 CH HD Audio (Realtek ALC897 Audio Codec)

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Supports Surge Protection

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Nahimic Audio

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Gigabit LAN 10/100/1000 Mb/s

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Giga PHY Intel® I219V

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Supports Wake-On-LAN

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Supports Lightning/ESD Protection

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Supports Energy Ecient Ethernet 802.3az

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Supports UEFI PXE

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802.11ax Wi-Fi 6E Module

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Supports IEEE 802.11a/b/g/n/ax

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Supports Dual-Band 2x2 160MHz with extended 6GHz

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band* support
* Wi-Fi 6E (6GHz band) will be supported by Microso®
Windows® 11. e availability will depend on the dierent
regulation status of each country and region.
It will be activated (for supported countries) through
Windows Update and soware updates once available.
* A 6GHz compatible router is required for 6E functionality.

2 antennas to support 2 (Transmit) x 2 (Receive) diversity

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technology

Supports Bluetooth + High speed class II

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Supports MU-MIMO

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8

Rear Panel
I/O

2 x Antenna Ports

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1 x PS/2 Mouse/Keyboard Port

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1 x HDMI Port

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1 x DisplayPort 1.4

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4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports

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ESD Protection)

English

B660M Pro RS/AX

2 x USB 2.0 Ports (Supports ESD Protection)

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1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED

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LED)
HD Audio Jacks: Line in / Front Speaker / Microphone

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Storage

RAID

Connector

CPU:

1 x Hyper M.2 Socket (M2_1, Key M), supports type

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2242/2260/2280 PCIe Gen4x4 (64 Gb/s) mode*

Chipset:

1 x Ultra M.2 Socket (M2_2, Key M), supports type 2280

•

SATA3 6.0 Gb/s & PCIe Gen3x4 (32 Gb/s) modes*
4 x SATA3 6.0 Gb/s Connectors**

•

* Supports Intel® OptaneTM Technology (M2_2 only)
* Supports Intel® Volume Management Device (VMD)
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
** If M2_2 is occupied by a SATA-type M.2 device, SATA3_0
will be disabled.

Supports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA

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storage devices

1 x SPI TPM Header

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1 x Chassis Intrusion and Speaker Header

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1 x RGB LED Header

•

* Supports in total up to 12V/3A, 36W LED Strip

3 x Addressable LED Headers

•

* Support in total up to 5V/3A, 15W LED Strip

1 x CPU Fan Connector (4-pin)

•

* e CPU Fan Connector supports the CPU fan of maximum
1A (12W) fan power.

1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan

•

Speed Control)
* e CPU/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.

3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan

•

Speed Control)

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English

BIOS
Feature

* e Chassis/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.
* CPU_FAN2/WP, CHA_FAN1~3/WP can auto detect if 3-pin
or 4-pin fan is in use.

1 x 24 pin ATX Power Connector

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1 x 8 pin 12V Power Connector (Hi-Density Power

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Connec tor)
1 x Front Panel Audio Connector

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1 x underbolt AIC Connector (5-pin) (Supports ASRock

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underbolt 4 AIC Card)
2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports

•

ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)

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(Supports ESD Protection)
1 x Front Panel Type C USB 3.2 Gen1 Header (Supports ESD

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Protection)

AMI UEFI Legal BIOS with multilingual GUI support

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ACPI 6.0 Compliant wake up events

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SMBIOS 2.7 Support

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CPU Core/Cache, CPU GT, DRAM, VDD_IMC, VCCIN

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AUX, +1.05V PROC, +0.82V PCH , +1.05V PCH Voltage
Multi-adjustment

10

Hardware
Monitor

OS

Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water

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Pump Fans
Quiet Fan (Auto adjust chassis fan speed by CPU tempera-

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ture): CPU, CPU/Water Pump, Chassis/Water Pump Fans
Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/

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Water Pump Fans
CASE OPEN detection

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Voltage monitoring: CPU Vcore, +1.05V_PCH, DRAM, VC-

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CIN AUX, +1.05V PROC, VCCSA, +0.82V PCH, +12V, +5V,
+3.3V

Microso® Windows® 10 64-bit / 11 64-bit

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English

B660M Pro RS/AX

FCC, CE

Certica­tions

* For detailed product information, please visit our website: http://www.asrock .com

Please realize that the re is a certain risk involved with overclocking, including
adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using
third-party overclocking tool s. Overclocking may aect your system’s stability, or
even cause damage to the components and devices of your system. It should be done
at your own risk and expense. We are not responsible for possible damage caused by
overclocking.

•

ErP/EuP Ready (ErP/EuP ready power supply is required)

•

11

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Chapter 2 Installation

is is a Micro ATX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts into it.

Pre-installation Precautions

Take note of the following precautions before you install motherboard components
or change any motherboard settings.

Make sure to unplug the power cord before installing or removing the motherboard

•

components. Failure to do so may cause physical injuries and damages to motherboard
components.
In order to avoid damage from static electricity to the motherboard’s components,

•

NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
Hold components by the edges and do not touch the ICs.

•

Whenever you uninstall any components, place them on a grounded anti-static pad or

•

in the bag that comes with the components.
When placing screws to secure the motherboard to the chassis, please do not over-

•

tighten the screws! Doing so may damage the motherboard.

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B660M Pro RS/AX

2.1 Installing the CPU

1. Before you insert the 1700-Pin CPU into the socket, please check if the PnP ca p is on the
socket, if the CPU surface is unclean, or if there are any bent pins in the socket. Do not
force to in sert the CPU into the socket if above situation is found. Otherwise, the CPU
will be seriously damaged.

2. Unplug all power cables before in stalling the CPU.

1

A

B

2 3

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4

76

5

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B660M Pro RS/AX

Please save and replace the cover if the processor i s removed. e cover must be placed if
you wish to return the motherboard for aer service.

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2.2 Installing the CPU Fan and Heatsink

1 2

16

CPU_FAN

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B660M Pro RS/AX

2.3 Installing Memory Modules (DIMM)

is motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots,
and supports Dual Channel Memory Technology.

1. For dual channel conguration , you always need to in stall identical (the same

brand, speed , size and chip-type) DDR4 DIMM pairs.

2. It is unable to activate Du al Channel Memory Technology with only one or three

memory module installed.

3. It is not allowed to install a DDR, DDR2 or DDR3 memory module into a DDR4

slot; otherwise, this motherboard and DIMM may be damaged.

Dual Channel Memory Conguration

Priority DDR4_A1 DDR4_A2 DDR4_B1 DDR4_B2

1 Populated Populated
2 Populated Populated Populated Populated

e DIMM only ts in one correct orientation. It will cause permanent damage to
the mothe rboard and the DIMM if you force the DIMM into the slot at incor rect
orientation.

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1

2

18

3



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B660M Pro RS/AX

2.4 Expansion Slots (PCIe Slots)

ere are 3 PCIe slots on the motherboard.

Before installing an ex pansion card, please make sure that the power supply is
switched o or the power cord is unplugged. Plea se read the documentation of the
expan sion card and make necessary hardware settings for the card before you start
the installation.

PCIe slots:

PCIE1 (PCIe 4.0 x16 slot) is used for PCIe x16 lane width graphics cards.
PCIE2 (PCIe 3.0 x1 slot) is used for PCIe x1 lane width cards.
PCIE3 (PCIe 3.0 x16 slot) is used for PCIe x4 lane width graphics cards.

PCIe Slot Congurations

PCIE1 PCIE3

Single Graphics Card Gen4x16 N/A

Two Graphics Cards in

CrossFire

TM

Mode

For a better ther mal environment, please connect a chassi s fan to the motherboard’s
chassis fan connector (CHA_ FAN1/WP, CHA_ FA N2/WP or CHA_FAN3/WP) when
using multiple graphics cards.

Gen4x16 Gen3x4

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2.5 Jumpers Setup

e illustration shows how jumpers are setup. When the jumper cap is placed on
the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is

“Open”.

Clear CMOS Jumper
(CLRMO S1)
(see p.1, No. 24)

CLRMOS1 allows you to clear the data in CMOS. To clear and reset the system
parameters to default setup, please turn o the computer and unplug the power
cord from the power supply. Aer waiting for 15 seconds, use a jumper cap to
short the pins on CLRMOS1 for 5 seconds. However, please do not clear the
CMOS right aer you update the BIOS. If you need to clear the CMOS when you
just nish updating the BIOS, you must boot up the system rst, and then shut it
down before you do the clear-CMOS action. Please be noted that the password,
date, time, and user default prole will be cleared only if the CMOS battery is
removed. Please remember toremove the jumper cap aer clearing the CMOS.

2-pin Jumper

20

If you clear the CMOS, the case open may be detec ted. Please adjust the BIOS option
“Clear Status” to clear the record of previou s chassis intrusion status.

English

B660M Pro RS/AX

2.6 Onboard Headers and Connectors

1

+5V

DUMMY

SIGNAL

GND

DUMMY

SPEAKER

DUMMY

Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over
these headers and connectors. Placing jumper caps over the headers and connectors
will cause permanent damage to the motherboard.

System Panel Header
(9-pi n PANEL1)
(see p.1, No. 13)

PWRBTN (Power Switch):

Connec t to the power switch on the chassi s front panel. You may congure the way to
turn o your system using the power switch.

RESET (Reset Switch):
Connec t to the reset switch on the chassis front panel. Press the reset sw itch to restart
the computer if the compute r freezes and fails to perform a normal restart.

PLED (Syste m Power LED):
Connec t to the power status indicator on the chassis front panel. e LED i s on when
the system is ope rating. e LED keeps blinking when the system i s in S1/S3 sleep
state. e LED is o when the system is in S4 sleep state or powered o (S5).

HDLED (Ha rd Drive Activity LED):
Connec t to the hard drive activity LED on the chassis front panel. e LED is on
when the hard drive i s reading or writing data.

e front panel design may dier by chassis. A front panel module mainly consists
of power switch, reset switch, power LED, hard dr ive activity LED, speak er and etc.
When connecting your chassis front panel module to this head er, make sure the wire
assig nments and the pin assig nments are matched correctly.

1

PLED+

PLED-

HDLED-

HDLED+

PWRBTN#

GND

RESET#

GND

GND

Connect the power switch,
reset switch and system status
indicator on the chassis to
this header according to the
pin assignments below. Note
the positive and negative pins
before connecting the cables.

Chassis Intrusion and
Speaker Header
(7-pi n SPK_CI1)
(see p.1, No. 20)

Please connect the
chassis intrusion and the
chassis speaker to this header.

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Serial ATA3 Connectors

ype-C Cable

DUMMY

GND

GND

P+

P-

USB_PWR

P+

P-

USB_PWR

1

1

Ver tica l:
(SATA3_0:
see p.1, No. 14)
(SATA3_1:
see p.1, No. 15)
Right Angle:
(SATA3_2:
see p.1, No. 12)(Upper)
(SATA3_3:
see p.1, No. 11)(Lower)

SATA3_2

SATA3_1 SATA3_0

ese four SATA3 connectors
support SATA data cables for
internal storage devices with

SATA3_3

up to 6.0 Gb/s data transfer
rate.
* If M2_2 is occupied by
a SATA-type M.2 device,
SATA3_0 will be disabled.

USB 2.0 Headers
(9-pin USB_3_4)
(see p.1, No. 19)
(9-pin USB_5_6)
(see p.1, No. 18)

USB 3.2 Gen1 Header
(19-pin USB3_5_6)
(see p.1, No. 9)

Front Panel Type C USB

3.2 Gen1 Header
(20-pin F_USB3_TC_1)
(see p.1, No. 10)

IntA_PA_SSRX-

IntA_PA_SSRX+

IntA_PA_SSTX-

IntA_PA_SSTX+

IntA_PA_D-

IntA_PA_D+

Vbus

GND

GND

USB T

VbusVbus

IntA_PB_SSRX-

IntA_PB_SSRX+

GND

IntA_PB_SSTX-

IntA_PB_SSTX+

GND

IntA_PB_D-

IntA_PB_D+

Dummy

ere are two USB 2.0 headers
on this motherboard.Each
USB 2.0 header can support
two ports.

ere is one USB 3.2 Gen1
header on this motherboard.
is USB 3.2 Gen1 header can
support two ports.

ere is one Front Panel
Type C USB 3.2 Gen1 Header
on this motherboard. is
header is used for connecting
a USB 3.2 Gen1 module for
additional USB 3.2 Gen1
ports.

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B660M Pro RS/AX

Front Panel Audio Header

J_SENSE

OUT2_L

1

MIC_RET

PRESENCE#

GND

OUT2_R

MIC2_R

MIC2_L

OUT_RET

GND

AN_SPEED_CONTRO

GND

1

FAN_SPEED_CONTROL

4 3 2 1

(9-pin HD_ AUDIO1)
(see p.1, No. 27)

1. High Denition Audio support s Jack Sensing, but the panel wire on the chassis

must support HDA to function correctly. Please follow the instructions in our
manual and chassis manual to install your system.

2. If you use an AC’97 audio panel , please install it to the front panel audio header by

the steps below:
A. Connect Mic_IN (MIC) to MIC2_ L.
B. Conne ct Audio_R (RIN) to OUT2_R and Audio_ L (LIN) to OUT2_ L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_ RET and OUT_RET are for the HD audio panel only. You don’t need to
connect them for the AC’97 audio panel.
E. To activate the front mic, go to the “FrontMic” Tab in the Realtek Control panel
and adjust “Recording Volume”.

is header is for connecting
audio devices to the front
audio panel.

Chassis/Water Pump Fan
Connectors
(4-pin CHA_FAN1/WP)
(see p.1, No. 28)

(4-pin CHA_FAN2/WP)
(see p.1, No. 21)
(4-pin CHA_FAN3/WP)
(see p.1, No. 22)

CPU Fan Connector
(4-pin CPU_FAN1)
(see p.1, No. 4)

2
3
4

FAN_VOLTAGE

1 2 3 4

FAN_VOLTAGE

CHA_FAN_SPEED

FAN_SPEED_CONTROL

CHA_FAN_SPEED

F

GND

+12V

CPU_F

AN_SPEED

is motherboard
provides three 4-Pin water
cooling

chassis

fan
connectors. If you plan to
connect a 3-Pin

chassis
cooler fan, please connect it to
Pin 1-3.

L

is motherboard provides
a 4-Pin CPU fan (Quiet Fan)
connector. If you plan to con­nect a 3-Pin CPU fan, please
connect it to Pin 1-3.

water

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CPU/Water Pump Fan

4 3 2 1

8 5

1

SPI_DQ3

#

Connector
(4-pin CPU_FAN2/WP)
(see p.1, No. 5)

GND

FAN_VOLTAGE

CPU_F

AN_SPEED

FAN_SPEED_CONTROL

is motherboard
provides a 4-Pin water cooling
CPU fan
connector. If you plan to con­nect a 3-Pin CPU water cooler
fan, please connect it to Pin
1-3.

ATX Power Connector
(24-pin ATXPWR1)
(see p.1, No. 8)

ATX 12V Power
Connector
(8-pin ATX12V1)
(see p.1, No. 1)

SPI TPM Header
(13 -pi n SPI_TPM _J1)
(see p.1, No. 16)

12

1

4 1

SPI_PWR

Dummy

CLK

RSMRST#

SPI_MISO

SPI_CS0

SPI_DQ2

24

13

SPI_MOSI

RST#

TPM_PIRQ

SPI_TPM_CS

GND

is motherboard provides a
24-pin ATX power connector.
To use a 20-pin ATX power
supply, please plug it along
Pin 1 and Pin 13.

is motherboard provides
a 8-pin ATX 12V power con­nector. To use a 4-pin ATX
power supply, please plug it
along Pin 1 and Pin 5.

*Warning: Please make

sure that the power cable

connected is for the CPU

and not the graphics card.

Do not plug the PCIe power

cable to this

connector.

is connector supports SPI Trusted
Platform Module (TPM) system,
which can securely store keys, digital
certicates, passwords, and data.
A TPM system also helps enhance
network security, protects digital
identities, and ensures platform
integrity.

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B660M Pro RS/AX

underbolt AIC

1

1

D

1

DO_ADDR

Connector
(5-pin TB1)
(see p.1, No. 23)

Please connect a underbolt™ add­in card (AIC) to this connector via
the GPIO cable.
*Please install the underbolt™
AIC card to PCIE3 (default slot).

RGB LED Header
(4-pin RGB_LED1)
(see p.1, No. 26)

Addressable LED Headers
(3-pin A DDR_LED1)
(see p.1, No. 25)

(3-pin A DDR_LED2)
(see p.1, No. 6)
(3-pin A DDR_LED3)
(see p.1, No. 7)

+12V GRB

DO_ADDR

VOUT

GND

VOUT

1

is RGB LED header is used to con­nect RGB LED
extension cable which allow
users to choose from various LED
lighting eects.

Caution: Never install the RGB

LED cable in the wrong orientation;

otherwise, the cable may be dam-

aged.

*Please refer to page 33 for
further instructions on this header.

ese three headers are used to con­nect

Addressable

GN

extension cables which allow
users to choose from various LED

LED

lighting eects.

Caution: Never install the Address-

able LED cable in the wrong orien-

tation; otherwise, the cable may be

damaged.

*Please refer to page 34 for
further instructions on this header.

25