Dabadger84Wouldn't recommend running a fan off the GPU's fan header, as that could further impact (negatively) the power limit on the card being utilized by the actual card, but it's for another fan, the 3 are for the on board fans on a FTW3 card as is indicated above.
ty_ger07JM3 (blue), JM4 (tan), and JM5 (black) are each for the fans. One fan for each connector. They are PWM fan connectors. One pin is power, one pin is ground, one pin is tachometer feedback, and one pin is PWM control signal. There is also another JM3 header by the RGB header. It is also for a fan. It's there so that you can add a case fan to run at the same duty % as the JM3 fan on the card.