Looks to me like the 12V pin is not connected to anything. If you look at the first two pictures, you can see that the pin for the 12V on the connector is not going through the PCB. Where have you measured voltage from? I would suggest putting a DMM on the pad on the bottom of the board, and measuring to see if it is at 12V.
Best of luck with that.
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Can anyone else here say that they have a watercooled monster that's 45" tall?
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