ASROCK B660M Pro RS/AX User manual

Version 1.0
Published April 2022
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is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
is equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. ese limits are designed to provide
reasonable protection against harmful interference in a residential installation. is
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and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment o and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit dierent from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.

e terms HDMI®and HDMI High-Denition Multimedia Interface, and the HDMI
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IMPORTANT - READ BEFORE COPYING, INSTALLING OR USING.
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Licensee’s specic rights may vary from country to country.

CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
perchlorate”
AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian Consumer
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any other reasonably foreseeable loss or damage caused by our goods. You are also entitled
to have the goods repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. If you require assistance please call ASRock Tel
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ASRock INC. hereby declares that this device is in compliance with the essential require-
ments and other relevant provisions of related UKCA Directives. Full text of UKCA decla-
ration of conformity is available at: http://www.asrock.com
ASRock INC. hereby declares that this device is in compliance with the essential require-
ments and other relevant provisions of related Directives. Full text of EU declaration of
conformity is available at: http://www.asrock.com
ASRock follows the green design concept to design and manufacture our products, and
makes sure that each stage of the product life cycle of ASRock product is in line with global
environmental regulations. In addition, ASRock disclose the relevant information based
on regulation requirements.
Please refer to https://www.asrock.com/general/about.asp?cat=Responsibility for informa-
tion disclosure based on regulation requirements ASRock is complied with:
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
crossed out wheeled bin indicates that the product (electrical and electronic
equipment) should not be placed in municipal waste. Check local regulations
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)
WiFi
2400-2483.5 MHz 18.5 + / -1.5 dbm
5150-5250 MHz 21.5 + / -1.5 dbm
5250-5350 MHz 18.5 + / -1.5 dbm (no TPC)
21.5 + / -1.5 dbm (TPC)
5470-5725 MHz 25.5 + / -1.5 dbm (no TPC)
28.5 + / -1.5 dbm (TPC)
Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm

English
1
B660M Pro RS/AX
Motherboard Layout
Intel
B660
ATXPWR1
HDLED RESET
PLED PWRBTN
PANEL1
1
1
1
2
CPU_FAN1
3
1
PCIE1
1
DDR4 _A2 (64 bit, 288-pi n module)
DDR4 _A1 (64 bit, 288-pi n module)
DDR4 _B2 (64 bit, 288-pi n module)
DDR4 _B1 (64 bit, 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 IN
Center:
FRONT
Bottom:
MIC IN
USB2.0
T: USB_1
B: USB_2
PS2
Keyboard
/Mouse
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_ US B3_ TC _1
10
SATA3_1
15
BIOS
ROM
24
CHA_FAN2/WP
21
SPK_CI1
1
20
HDMI1
LAN
AUDIO
CODECDRAM
CPU
VGA
BOOT
1
ADDR_LED2
17
DP1
25
M2_WIFI1
WiFi-802.11ax
Module

English
2
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)

English
3
B660M Pro RS/AX
I/O Panel
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.
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:
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
ACT/LINK LED
SPEED LED
LAN Port
11 569
10
42
3
1
78

English
4
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.

English
5
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.