ASROCK DeskMini B660 User manual

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Version 1.0
Published January 2022
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.
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
Law. You are entitled to a replacement or refund for a major failure and compensation for
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.
e terms HDMI™ and HDMI High-Denition Multimedia Interface, and the HDMI
logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.

Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 6
1.4 Front Panel 9
1.5 Rear Panel 10
Chapter 2 Installation 11
2.1 Installing the CPU 12
2.2 Installing the CPU Fan and Heatsink 15
2.3 Installing Memory Modules (SO-DIMM) 16
2.4 Jumpers Setup 18
2.5 Onboard Headers and Connectors 19
2.6 M.2 WiFi/BT Module and Intel® CNVi (Integrated WiFi/BT)
Installation Guide 22
2.7 M.2_SSD (NGFF) Module Installation Guide 24
Chapter 3 Auto Driver Installer 26
Chapter 4 UEFI SETUP UTILITY 27
4.1 Introduction 27
4.2 EZ Mode 28
4.3 Advanced Mode 29
4.3.1 UEFI Menu Bar 29

4.3.2 Navigation Keys 30
4.4 Main Screen 31
4.5 OC Tweaker Screen 32
4.6 Advanced Screen 42
4.6.1 CPU Conguration 43
4.6.2 Chipset Conguration 46
4.6.3 Storage Conguration 48
4.6.4 ACPI Conguration 49
4.6.5 USB Conguration 50
4.6.6 Trusted Computing 51
4.7 Tools 53
4.8 Hardware Health Event Monitoring Screen 55
4.9 Security Screen 56
4.10 Boot Screen 57
4.11 Exit Screen 59

PB 1
English
B660M-STX
Chapter 1 Introduction
ank you for purchasing B660M-STX motherboard. In this documentation,
Chapter 1 and 2 contains the introduction of the motherboard and step-by-step
installation guides. Chapter 3 contains the operation guide of the soware and
utilities. Chapter 4 contains the conguration guide of the BIOS setup.
1.1 Package Contents
• B660M-STX Motherboard (Mini-STX Form Factor)
• B660M-STX Quick Installation Guide
• 1 x I/O Panel Shield
• 2 x Serial ATA(SATA) Data with Power Cable (Optional)
• 2 x Screws for M.2 Sockets (M2*2) (Optional)
• 1 x Screw for WiFi Module (M2*2) (Optional)
Because the motherboard specications and the BIOS soware might be updated, the
content of this documentation will be subject to change without notice.

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English
1.2 Specications
Platform • Mini-STX Form Factor
CPU • Supports 12th Gen Intel® CoreTM Processors (LGA1700)
• Digi Power design
• 4 Power Phase design
• Supports Intel® Hybrid Technology
• Supports Intel® Turbo Boost Max 3.0 Technology
Chipset • Intel®B660
Memory • Dual Channel DDR4 Memory Technology
• 2 x DDR4 SO-DIMM Slots
• Supports DDR4 3200/2933/2800/2666/2400/2133 non-ECC,
un-buered memory
* Supports DDR4 3200 natively.
• Max. capacity of system memory: 64GB
• Supports Intel® Extreme Memory Prole (XMP) 2.0
• 15μ Gold Contact in DIMM Slots
Expansion
Slot
• 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module
and Intel® CNVi (Integrated WiFi/BT)
Graphics • Intel® UHD Graphics Built-in Visuals and the VGA outputs
can be supported only with processors which are GPU
integrated.
• Intel® XeGraphics Architecture (Gen 12)
• Four graphics output options: D-Sub, HDMI, DisplayPort 1.4
and DisplayPort 1.4 (over USB Type-C Alt Mode)
* Supports up to 4 displays simultaneously
• Supports HDMI 2.1 TMDS Compatible with max. resolution
up to 4K x 2K (4096x2160) @ 60Hz
• Supports D-Sub with max. resolution up to 1920x1200 @
60Hz
• Supports DisplayPort 1.4 with DSC (compressed) max.
resolution up to 8K (7680x4320) @ 60Hz / 5K (5120x3200) @
120Hz

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English
B660M-STX
• Supports HDCP 2.3 with HDMI 2.1 TMDS Compatible and
DisplayPort 1.4 Ports
Audio • Realtek ALC269 Audio Codec
• 1 x Headphone/Headset Jack
• 1 x MIC-In
• 1 x Audio Header
LAN • Gigabit LAN 10/100/1000 Mb/s
• Giga PHY Intel® I219V
• Supports Wake-On-LAN
• Supports Lightning/ESD Protection
• Supports Energy Ecient Ethernet 802.3az
• Supports PXE
Front
Panel I/O
• 1 x Headphone/Headset Jack
• 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Pro-
tection)
• 1 x USB 3.2 Gen2x2 Type-C Port (20 Gb/s) (Supports ESD
Protection)
• 1 x Microphone Input Jack
Rear Panel
I/O
• 1 x DC Jack (Compatible with the 19V power adapter)*
* Please use 120W power adapter for 65W CPU and 90W power
adapter for 35W CPU.
• 1 x D-Sub Port
• 1 x HDMI Port
• 1 x DisplayPort 1.4
• 2 x USB 2.0 Ports (Supports ESD Protection)
• 2 x USB 3.2 Gen1 Type-A Ports (Supports ESD Protection)
• 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD
Protection)
* Supports USB Type-C Alt Mode
• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
LED)

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English
Storage • 2 x SATA3 6.0 Gb/s Connectors
• 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280
PCIe Gen5x4 (128 Gb/s) mode*
• 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2280
PCIe Gen4x4 (64 Gb/s) mode*
* Supports Intel® OptaneTM Technology
** Supports Intel® Volume Management Device (VMD)
* Supports NVMe SSD as boot disks
RAID • Supports RAID 0 and RAID 1 for SATA storage devices
Connector • 2 x CPU Fan Connectors (2 x 4-pin)
• 1 x Internal Speaker Header
• 1 x Front Panel Header
• 1 x USB 2.0 Header (Supports 2 USB 2.0 ports) (Supports ESD
Protection)
• 1 x Audio Header
BIOS
Feature
• MI UEFI Legal BIOS with multilingual GUI support
• ACPI 6.0 Compliant wake up events
• SMBIOS 2.7 Support
• DRAM Voltage Multi-adjustment
Hardware
Monitor
• CPU Temperature Sensing
• CPU Fan Tachometer
• CPU Quiet Fan (Auto adjust chassis fan speed by CPU
temperature)
• CPU Fan Multi-Speed Control
• Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore
OS • Microso® Windows® 10 64-bit / 11 64-bit
Certica-
tions
• FCC, CE
• ErP/EuP ready (ErP/EuP ready power supply is required)

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English
B660M-STX
Mini-STX Chassis Support List
Please realize that there is a certain risk involved with overclocking, including adjusting
the setting in the BIOS, applying Untied Overclocking Technology, or using third-party
overclocking tools. 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.
Vendor Model
SilverStone Technology Inc. VT01S
AKasa A-STX04-A1B / A-STX04-M1B

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English
Top:
RJ-45
RoHS
1
5
USB_8_9
1
3
HDLED RESET
PLED PWRBTN
PANEL1
1
Mic In
USB 3.2 Gen2x2
USB_2
USB 3.2 Gen2
USB_3
USB 3.2 Gen2
USB_1
Headphone
/ Headset
VGA1
8
7
DDR4_A1DDR4_A1 DDR4_B1
DC Jack
SPEAKER1
1
Super
I/O
BIOS
ROM
M2_WIFI
M2 _ 1
M2_WIFI_CT1
M2_1_CT1
CPU_FAN1
CPU_FAN2
1
AUDIO3
B660M-STX
1
CLRMOS1
6
2
CMOS
Battery
4
DP_1
HDMI1
USB 3.2 Gen1
T: USB_6
B: USB_7
USB 2.0
T: USB_4
B: USB_5
Intel
B660
1.3 Motherboard Layout

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English
B660M-STX
910
SATA3SATA3
M2_2
Back Side View

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English
No. Description
1 CPU Fan Connector (CPU_FAN1)
2 2 x 260-pin DDR4 SO-DIMM Slots (DDR4_A1, DDR4_B1)
3 Clear CMOS Jumper (CLRMOS1)
4 System Panel Header (PANEL1)
5 USB 2.0 Header (USB_8_9)
6 MONO Speaker Header (SPEAKER1)
7Audio Header (AUDIO3)
8 CPU Fan Connector (CPU_FAN2)
9 SATA3 Connector (SATA2)
10 SATA3 Connector (SATA1)

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English
B660M-STX
1.4 Front Panel
No. Description No. Description
1Headphone/Headset Jack (AUDIO1) 3 USB 3.2 Gen2x2 Type-C Port (USB_2)
2 USB 3.2 Gen2 Type-A Port (USB_1) 4 Microphone Input (AUDIO2)
1234

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English
1.5 Rear Panel
No. Description No. Description
1 DC Jack* 5 HDMI Port
(Supports 19V DC Power Adapters) 6 USB 2.0 Ports
2D-Sub Port (USB_4_5)
3 USB 3.2 Gen2 Type-C Port (USB_3) 7 USB 3.2 Gen1 Type-A Ports
(Supports USB Type-C Alt Mode) (USB_6_7)
4DisplayPort 1.4 8 LAN RJ-45 Port**
** ere are two LEDs on each 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
ACT/LINK LED
SPEED LED
LAN Port
12 7
8
64
5
3
*Specication for DC plug
2.5 mm
5.5 mm

10 11
English
B660M-STX
is is a Mini-STX 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.
Chapter 2 Installation

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English
2.1 Installing the CPU
1. Before you insert the 1700-Pin CPU into the socket, please check if the PnP cap is on the
socket, if the CPU surface is unclean, or if there are any bent pins in the socket. Do not
force to insert the CPU into the socket if above situation is found. Otherwise, the CPU
will be seriously damaged.
2. Unplug all power cables before installing the CPU.
1
A
B
2 3

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English
B660M-STX
5
76
4

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English
Please save and replace the cover if the processor is removed. e cover must be placed if
you wish to return the motherboard for aer service.

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English
B660M-STX
2.2 Installing the CPU Fan and Heatsink
1 2
CPU_FAN