MSI B660-A PRO DDR4 User Manual

1
Thank you for purchasing the MSI® motherboard. This User Guide gives
information about board layout, component overview, BIOS setup and software
installation.
Contents
Safety Information ........................................................................................................ 3
Specifications ................................................................................................................ 4
Special Features ........................................................................................................... 8
Back Panel Connectors ............................................................................................... 9
LAN Port LED Status Table .................................................................................. 10
Installing antennas (PRO B660M-A WIFI DDR4) .................................................. 11
Overview of Components ........................................................................................... 12
CPU Socket ........................................................................................................... 13
DIMM Slots ............................................................................................................ 14
PCI_E1~3: PCIe Expansion Slots .......................................................................... 15
JFP1, JFP2: Front Panel Connectors ................................................................... 15
M2_1~2: M.2 Slots (Key M) ................................................................................... 16
SATA5~8: SATA 6Gb/s Connectors ....................................................................... 18
JAUD1: Front Audio Connector ............................................................................ 18
CPU_PWR1~2, ATX_PWR1: Power Connectors ................................................... 19
CPU_FAN1, PUMP_FAN1, SYS_FAN1~2: Fan Connectors .................................. 20
JCI1: Chassis Intrusion Connector ....................................................................... 21
JBAT1: Clear CMOS (Reset BIOS) Jumper ........................................................... 21
JUSB4: USB 3.2 Gen 1 5Gbps Type-C Connector ................................................. 22
JUSB3: USB 3.2 Gen 1 Connector ........................................................................ 22
JUSB1~2: USB 2.0 Connectors ............................................................................. 23
JTPM1: TPM Module Connector ........................................................................... 23
JTBT1: Thunderbolt Add-on Card Connector ...................................................... 24
JCOM1: Serial Port Connector ............................................................................. 24
JDASH1: Tuning controller Connector ................................................................. 24
JRGB1: RGB LED connector ................................................................................. 25
JRAINBOW1~2: Addressable RGB LED connectors ............................................ 25

MSI B660-A PRO DDR4 Specifications

General

Chipset	Intel B660
Memory Type	DDR4
Form Factor	ATX
Socket	LGA 1700
Memory Slots	4
Maximum Memory	128 GB
PCIe x1 Slots	2
M.2 Slots	2
SATA Ports	6
Audio	Realtek ALC897
RAID Support	RAID 0, 1, 5, 10
USB Ports	USB 3.2 Gen 2x2 (1), USB 3.2 Gen 2 (1), USB 3.2 Gen 1 (2), USB 2.0 (2)