ASRock Z270 Killer SLI Quick Installation Guide - Page 28
Only one Tunderbolt AIC
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English CPU Fan Connector (4-pin CPU_FAN1) (see p.1, No. 4) ATX Power Connector (24-pin ATXPWR1) (see p.1, No. 5) ATX 12V Power Connector (8-pin ATX12V1) (see p.1, No. 1) Thunderbolt AIC Connectors (10-pin TB1) (see p.1, No. 24) (5-pin TB2) (see p.1, No. 20) Serial Port Header (9-pin COM1) (see p.1, No. 22) 26 FAN_SPEED_CONTROL CPU_FAN_SPEED FAN_VOLTAGE GND 1 2 34 This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3. 12 24 1 13 This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13. 8 5 This motherboard pro- vides an 8-pin ATX 12V power connector. To use a 4 1 4-pin ATX power supply, please plug it along Pin 1 and Pin 5. DUMMY I2C_DATA I2C_CLOCK IRQ GND 1 GND SLP_S4# SLP_S3# PLUG_EVENT FRC_PWR Please connect a Thunderbolt™ add-in card (AIC) to the Thunderbolt AIC connector via the GPIO cable. * Please install the Thunderbolt™ AIC card to PCIE4 (default slot). * Only one Thunderbolt AIC Card is supported on this motherboard. RRXD1 DDTR#1 DDSR#1 CCTS#1 1 RRI#1 RRTS#1 GND TTXD1 DDCD#1 This COM1 header supports a serial port module.