Acer Veriton 5800 Veriton 5800/6800/7800 Service Guide (Gigabyte MB) - Page 92

CPU FAN / SYS FAN (Cooler Fan Power Connector) The cooler fan power connector supplies a +12V power voltage via a 3-pin/4-pin (only for 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). Please remember to connect the power to the cooler to prevent system overheating and failure. CAUTION: Please remember to connect the power to the CPU fan to prevent CPU overheating and failure. Illustration 1 2 1 CPU_FAN Pin No. GND +12V Sense Definition 3 4 Speed Control (Only for CPU Fan) 1 SYS_FAN Chapter 5 91