Gigabyte M5NM1AI User Manual - Page 19

9) SATA0/SATA1 (SATA 3Gb/s Connectors) The SATA connectors conform to SATA 3Gb/s standard and are compatible with SATA 1.5Gb/s standard. Each SATA connector supports a single SATA device. 7 1 Pin No. 1 2 3 4 5 6 7 Definition GND TXP TXN GND RXN RXP GND 10/11) CPU_FAN/SYS_FAN (CPU Fan/System Fan Headers) The motherboard has a 4-pin CPU fan header (CPU_FAN) and a 4-pin System fan header (SYS_FAN) header. Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The motherboard supports CPU fan speed control, which requires the use of a CPU fan with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the chassis. 1 CPU_FAN SYS_FAN Pin No. 1 2 3 4 Definition GND +12V Sense Speed Control • Be sure to connect fan cables to the fan headers to prevent your CPU and system from overheating. Overheating may result in damage to the CPU or the system may hang. • These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers. - 19 - Hardware Installation