I can confirm that there are 7x 4pin headers for fans.

Fan configuration in the BIOS/Q-Fan was a disaster for me, especially after the "automatic calibration" the lowest adjustable fan speed was much too high (as far as I remember sometimes over 40%, while the fan runs at 20% without any problems). And the calibrated values could not be reset anywhere, in the end I had to do a complete CMOS reset.
Maybe this has been fixed in the meantime by a BIOS update (I set up the PC a little over a year ago).

Anyway, after the reset I left Q-Fan and calibration behind and bought Argus Monitor for fan control and temperature monitoring. There, I can control the fans depending on CPU *and* GPU (e.g. start the case fans when GPU is hot but CPU is still idle) and also set longer start-up/run-down times (no constant start-up and shut-down of the fans).

With the pump headers there should be 7 in total.