Mainboard ASRock B660M PRO RS/AX (QSD)

Asrock

1 x PCIe 4.0 x16 Slot,

1 x PCIe 3.0 x16 Slot (supports x4 mode)

1 x PCIe 3.0 x1 Slot

1 x M.2 Socket (Key E)

1 x SPI TPM Header
1 x Chassis Intrusion and Speaker Header
1 x RGB LED Header*
3 x Addressable LED Headers**
1 x CPU Fan Connector (4-pin)***
1 x CPU/Water Pump Fan Connector (4-pin) 
3 x Chassis/Water Pump Fan Connectors (4-pin) 
1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector
1 x Front Panel Audio Connector
1 x Thunderbolt™ AIC Connector (5-pin) (Supports ASRock Thunderbolt™ 4 AIC Card)
2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
1 x Front Panel Type C USB 3.2 Gen1 Header (Supports ESD Protection)

2 x Antenna Ports
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
1 x DisplayPort 1.4
4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports ESD Protection)
2 x USB 2.0 Ports (Supports ESD Protection)
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Line in / Front Speaker / Microphone

24.4 cm x 24.4 cm

m-ATX Form Factor