Model

Brand	MSI
Model	PRO B660M-A DDR4

Supported CPU

CPU Socket Type	LGA 1700
CPU Type	Supports 13th / 12th Gen Intel Core Processors, Intel Pentium Gold, Celeron Processors

Chipsets

Chipset	Intel B660

Onboard Video

Onboard Video Chipset	Supported only by CPU with integrated graphic

Memory

Number of Memory Slots	4x288pin (DDR4)
Memory Standard	DDR4 1R 3200 / 2666 / 2133 (by JEDEC & POR) Max overclocking frequency: 1DPC 1R Max speed up to 4800+ 1DPC 2R Max speed up to 4000+ 2DPC 1R Max speed up to 4000+ 2DPC 2R Max speed up to 3600+
Maximum Memory Supported	128GB
Channel Supported	Dual Channel

Expansion Slots

PCI Express 4.0 x16	1 x PCI Express 4.0 x16 * Actual support may vary by CPU.
PCI Express 3.0 x16	1 x PCI Express 3.0 x16 * Support PCIe 3.0 x4.
PCI Express x1	1 x PCI Express 3.0 x1

Storage Devices

SATA 6Gb/s	4 x SATA 6Gb/s * SATA8 will be unavailable when installing M.2 SATA SSD in the M2_2 slot.
M.2	2 x M.2 slots (Key M): M2_1 slot (From CPU): Supports up to PCIe 4.0 x4 Supports 2242/ 2260/ 2280 storage devices M2_2 slot (From B660 chipset): Supports up to PCIe 4.0 x4 Supports up to SATA 6Gb/s Supports 2242/ 2260/ 2280 storage devices Supports Intel Optane Memory
Intel Optane Ready	Yes
SATA RAID	0/1/5/10

Onboard Audio

Audio Chipset	Realtek ALC897
Audio Channels	7.1 Channels

Onboard LAN

LAN Chipset	Realtek RTL8125BG
Max LAN Speed	2.5Gbps

Rear Panel Ports

Back I/O Ports	1 x LAN (RJ45) 1 x PS/2 Keyboard/Mouse Combo 2 x DisplayPort 2 x HDMI 2 x USB 2.0/1.1 2 x USB 3.2 Gen 1 Type-A 2 x USB 3.2 Gen 2 Type-A 3 x Audio Jacks

Internal I/O Connectors

Onboard USB	1 x USB 3.2 Gen 1 5Gbps Type-C port 1 x USB 3.2 Gen 1 5Gbps Type-A connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports) 2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
Other Connectors	1 x 4-pin CPU fan connector 1 x 4-pin water-pump fan connector 2 x 4-pin system fan connectors 1 x Front panel audio connector 2 x System panel connectors 1 x Chassis Intrusion connector 1 x TPM module connector 1 x Clear CMOS jumper 1 x TBT connector (supports RTD3) 1 x Serial port 1 x Tuning Controller connector 1 x 4-pin RGB LED connector 2 x 3-pin RAINBOW LED connectors 4 x EZ Debug LED