Tut me exactly what he should. At points where two fans of the same manufacturer with the same U / min run (should) but you want to use only one fan slot on the motherboard right. Where a plug has the full number of pins ([....]), has the other three pins ([. ..]). That is virtually a fan, which is connected to the 4 pin, sets the tone (bsp. 1100rpm) and the other, which is connected to the 3-Pin, the rotation of the other fan to fit (read also 1100rpm). The concept works 140mm with me without errors, the operation of a 280 radiator, with 2 Silentwings2 PWM.
