ASRock B550M Steel Legend User Manual - Page 14
x 288-pin DDR4 DIMM Slots DDR4_A1, DDR4_B1
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No. Description 1 8 pin 12V Power Connector (ATX12V1) 2 4 pin 12V Power Connector (ATX12V2) 3 CPU Fan Connector (CPU_FAN1) 4 CPU/Water Pump Fan Connector (CPU_FAN2/WP) 5 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1) 6 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2) 7 RGB LED Header (RGB_LED1) 8 Addressable LED Header (ADDR_LED1) 9 ATX Power Connector (ATXPWR1) 10 USB 3.2 Gen1 Header (F_USB3_1_2) 11 SATA3 Connector (SATA3_2) 12 SATA3 Connector (SATA3_1) 13 SATA3 Connector (SATA3_4) 14 SATA3 Connector (SATA3_3) 15 SATA3 Connector (SATA3_5) 16 SATA3 Connector (SATA3_6) 17 System Panel Header (PANEL1) 18 Power LED and Speaker Header (SPK_PLED1) 19 USB 3.2 Gen1 Header (F_USB3_3_4) 20 Chassis/Water Pump Fan Connector (CHA_FAN4/WP) 21 Post Status Checker (PSC) 22 SPI TPM Header (SPI_TPM_J1) 23 USB 2.0 Header (USB_3_4) 24 USB 2.0 Header (USB_5_6) 25 Chassis/Water Pump Fan Connector (CHA_FAN2/WP) 26 Chassis/Water Pump Fan Connector (CHA_FAN3/WP) 27 Clear CMOS Jumper (CLRCMOS1) 28 Thunderbolt AIC Connector (TB1) 29 Addressable LED Header (ADDR_LED2) 30 RGB LED Header (RGB_LED2) 31 Front Panel Audio Header (HD_AUDIO1) 32 Chassis/Water Pump Fan Connector (CHA_FAN1/WP) 8 English