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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 .................................................................................... 9
Installing antennas (PRO B660M-A WIFI DDR4) .................................................. 10
Overview of Components ........................................................................................... 11
CPU Socket ........................................................................................................... 12
DIMM Slots ............................................................................................................ 13
PCI_E1~3: PCIe Expansion Slots .......................................................................... 14
JFP1, JFP2: Front Panel Connectors ................................................................... 14
M2_1~2: M.2 Slots (Key M) ................................................................................... 15
SATA5~8: SATA 6Gb/s Connectors ....................................................................... 17
JAUD1: Front Audio Connector ............................................................................ 17
CPU_PWR1~2, ATX_PWR1: Power Connectors ................................................... 18
CPU_FAN1, PUMP_FAN1, SYS_FAN1~2: Fan Connectors .................................. 19
JCI1: Chassis Intrusion Connector ....................................................................... 20
JBAT1: Clear CMOS (Reset BIOS) Jumper ........................................................... 20
JUSB4: USB 3.2 Gen 1 5Gbps Type-C Connector ................................................. 21
JUSB3: USB 3.2 Gen 1 Connector ........................................................................ 21
JUSB1~2: USB 2.0 Connectors ............................................................................. 22
JTPM1: TPM Module Connector ........................................................................... 22
JTBT1: Thunderbolt Add-on Card Connector ...................................................... 23
JCOM1: Serial Port Connector ............................................................................. 23
JDASH1: Tuning controller Connector ................................................................. 23
JRGB1: RGB LED connector ................................................................................. 24
JRAINBOW1~2: Addressable RGB LED connectors ............................................ 24
