Asus Pro B660M-C D4-CSM Motherboard Micro ATX Intel 1700 Socket

Fan and cooling related
1 x 4-pin CPU Fan header
2 x 4-pin Chassis Fan headers
Power related
1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
Storage related
2 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
USB
1 x USB 3.2 Gen 1 connector (suppports USB Type-C®)
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Miscellaneous
1 x Clear CMOS header
1 x Chassis Intrude header
2 x COM Port headers
1 x Front Panel Audio header (AAFP)
1 x COM debug header
1 x LPT header
1 x Mono-out header(with Amp IC)
1 x M.2 slot (Key E)
1 x SMBUS header
1 x Speaker header
1 x 10-1 pin System Panel header

Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports
Intel® 13th & 12th Gen Processors
M.2_1 slot (Key M), type 2242/2260/2280
- Intel® 12th Gen processors support PCIe 4.0 x4 mode
Intel® B660 Chipset**
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4)
4 x SATA 6Gb/s ports

* Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.
** Intel® Rapid Storage Technology supports Intel® Optane Memory H Series on PCH attached M.2 slots.

Intel® 13th & 12th Gen Processors
1 x PCIe 4.0/3.0 x16 slot
Intel® B660 Chipset
2 x PCIe 3.0 x1 slots