I bought the P8B75 M-LX By asus motherboard a few weeks ago, and it had this problem described in the title.
I only had the PSU connected to the motherboard with the fans connected to the molex connectors on PSU, some were also connected to my fan controller.
Anyway i tried a different motherboard, a VERY old one and this managed to work (e.g Fans powered on, psu fan powered on) So i sent the Asus motherboard back and got a replacement, but only to find the exact same problem again?! Someone help? This is also my first ever build so be nice
I only had the PSU connected to the motherboard with the fans connected to the molex connectors on PSU, some were also connected to my fan controller.
Anyway i tried a different motherboard, a VERY old one and this managed to work (e.g Fans powered on, psu fan powered on) So i sent the Asus motherboard back and got a replacement, but only to find the exact same problem again?! Someone help? This is also my first ever build so be nice