AsRock Extreme 4 Z77 Fan headers

Solution
It has 3 Case (Chassis) fan headers, 1 of which (CHA_FAN1 located at the bottom of the board) is a 4 pin PWM header. The other 2 are just normal 3 pin headers.

It has 2 4 pin headers total, but the other is the CPU fan header.

Edit: There's also a second CPU fan header and a PWR fan header, but they're both 3 pin, as well.
It has 3 Case (Chassis) fan headers, 1 of which (CHA_FAN1 located at the bottom of the board) is a 4 pin PWM header. The other 2 are just normal 3 pin headers.

It has 2 4 pin headers total, but the other is the CPU fan header.

Edit: There's also a second CPU fan header and a PWR fan header, but they're both 3 pin, as well.
 
Solution