ASROCK B450 Steel Legend Manual page 4

No. Description
1 ATX 12V Power Connector (ATX12V1)
2 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
3 AMD Fan LED Header (AMD_FAN_LED1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
5 CPU/Water Pump Fan Connector (CPU_FAN2/WP)
6 CPU Fan Connector (CPU_FAN1)
7 ATX Power Connector (ATXPWR1)
8 USB 3.1 Gen1 Header (USB3_5_6)
9 SATA3 Connector (SATA3_1)
10 SATA3 Connector (SATA3_2)
11 SATA3 Connector (SATA3_A1)
12 SATA3 Connector (SATA3_A2)
13 SATA3 Connector (SATA3_3)
14 SATA3 Connector (SATA3_4)
15 System Panel Header (PANEL1)
16 Power LED and Speaker Header (SPK_PLED1)
17 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
18 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
19 Clear CMOS Jumper (CLRCMOS2)
20 Addressable LED Header (ADDR_LED1)
21 USB 2.0 Header (USB_3_4)
22 USB 2.0 Header (USB_1_2)
23 COM Port Header (COM1)
24 RGB LED Header (RGB_LED1)
25 TPM Header (TPMS1)
26 Front Panel Audio Header (HD_AUDIO1)
27 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)
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