ASROCK B660M Steel Legend Manual page 5

No. Description
1 ATX 12V Power Connector (ATX12V1)
2 CPU Fan Connector (CPU_FAN1)
3 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
5 CPU/Water Pump Fan Connector (CPU_FAN2/WP)
6 Addressable LED Header (ADDR_LED3)
7 Addressable LED Header (ADDR_LED2)
8 ATX Power Connector (ATXPWR1)
9 USB 3.2 Gen1 Header (USB3_5_6)
10 Front Panel Type C USB 3.2 Gen2x2 Header (F_USB3_TC_1)
11 SATA3 Connector (SATA3_0)(Upper)
12 SATA3 Connector (SATA3_1)(Lower)
13 SATA3 Connector (SATA3_3)(Lower)
14 SATA3 Connector (SATA3_2)(Upper)
15 System Panel Header (PANEL1)
16 Post Status Checker (PSC)
17 SATA3 Connector (SATA3_A1)
18 SATA3 Connector (SATA3_A2)
19 SPI TPM Header (SPI_TPM_J1)
20 USB 2.0 Header (USB_5_6)
21 USB 2.0 Header (USB_3_4)
22 Chassis Intrusion and Speaker Header (SPK_CI1)
23 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
24 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
25 Clear CMOS Jumper (CLRMOS1)
26 RGB LED Header (RGB_LED1)
27 Addressable LED Header (ADDR_LED1)
28 Front Panel Audio Header (HD_AUDIO1)
29 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)
2