ASRock B450M/ac R2.0 User Manual - Page 14
x 288-pin DDR4 DIMM Slots DDR4_A2, DDR4_B2
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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 AMD Fan LED Header (AMD_FAN_LED1) 6 ATX Power Connector (ATXPWR1) 7 USB 3.2 Gen1 Header (USB3_5_6) 8 AMD LED Fan USB Header (USB_7) 9 SATA3 Connector (SATA3_3)(Upper) 10 SATA3 Connector (SATA3_4)(Lower) 11 SATA3 Connector (SATA3_2)(Lower) 12 SATA3 Connector (SATA3_1)(Upper) 13 System Panel Header (PANEL1) 14 Power LED and Speaker Header (SPK_PLED1) 15 Chassis Intrusion Header (CI1) 16 Chassis Fan Connector (CHA_FAN2) 17 USB 2.0 Header (USB_3_4) 18 USB 2.0 Header (USB_5_6) 19 Clear CMOS Jumper (CLRCMOS1) 20 RGB LED Header (RGB_HEADER1) 21 Addressable LED Header (ADDR_LED1) 22 Front Panel Audio Header (HD_AUDIO1) 23 Chassis/Water Pump Fan Connector (CHA_FAN1) 8 English