I do not want to connect them to the motherboard is this below what i need to connect them to a molex from the psu.
Connect molex fan to psu.
For this reason you might want to have a look at some fan controllers some of these will let you connect multiple 3 pin fans using a molex connector which makes hooking them up a bit easier and let you either control the speed manually with controls that.
Connect all the fan wires to the fan controller right.
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Yup just connect the fan controller to the two molex connectors as the fan controller gets power through 2 molex connectors.
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The problem with connect most fans to the psu is that they won t be temperature controlled they ll just spin at full speed all the time.
These are 3 pin fans will they connect to this 4 pin speed.