Gigabyte MNNM1PI Manual - Page 19

12 ) DIO (Digtal I/O connector) Connector Introduction Pin No. Definition 12 1 2 VCC3 VCC3 3 VCC3 4 VCC3 78 5 ATX_3VSB 6 ATX_3VSB 7 ATX_3VSB 8 GND 13/14 ) CPU_FAN/SYS_FAN (CPU fan/System fan cable connectors) The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin(CPU_FAN) power connector and possesses a foolproof connection design. Most coolers are designed with color-coded power connector wires. A red power connector wire indicates a positive connection and requires a +12V power voltage. The black connector wire is the ground wire (GND). Remember to connect the CPU/system fan cable to the CPU_FAN/SYS_FAN connector to prevent CPU damage or system hanging caused by overheating. 1 CPU_FAN Pin No. 1 2 3 4 Definition GND 12V Sense Control SYS_FAN 19