Quick overview from the supplier:
MB S1700 Asus PRIME B660M-A D4 mATX
// CPU
Intel® Socket LGA1700 for 12th Gen Intel® Core™, Pentium® Gold and Celeron® Processors
Chipset
- Intel® B660
Memory
4 x DIMM, Max. 128GB, DDR4
5333(OC)/5000(OC)/4800(OC)/4600(OC)/4400(OC)/4266(OC)/4000(OC)/3733(OC)/3600(OC)/3466(OC)/3400(OC)/3333(OC)/3200/3000/2933/2800/2666/2400/2133 Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Graphic
Integrated Graphics Processor
1 x DisplayPort**
2 x HDMI® ports***
Expansion Slots
1 x PCIe 4.0/3.0 x16 slot
1 x PCIe 3.0 x16 slot (supports x4 mode)
1 x PCIe 3.0 x16 slot (supports x1 mode)
Storage
Total supports 2 x M.2 slots and 4x SATA 6Gb/s ports*
M.2_1 slot (Key M), type 2242/2260/2280 (support PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)*
4 x SATA 6Gb/s ports
* Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.
LAN
1 x Realtek 1Gb Ethernet
Audio
Realtek 7.1 Surround Sound High Definition Audio CODEC*
USB Ports
Rear USB (Total 6 ports)
2 x USB 3.2 Gen 2 ports (2 x Type-A )
4 x USB 2.0 ports (4 x Type-A)
Front USB (Total 10 ports)
2 x USB 3.2 Gen 1 headers support additional 4 USB 3.2 Gen 1 ports
1 x USB 3.2 Gen 1 connector (supports USB Type-C®)
2 x USB 2.0 headers support additional 4 USB 2.0 ports
1 x USB 2.0 header support 1 USB 2.0 port
https://www.asus.com/Motherboards-Components/Motherboards/PRIME/PRIME-B660M-A-D4/
