Generally the psu shroud is a solid metal cover with no vents mostly so in such cases the position of the fan should remain down only regardless of anything.
Case fan to psu.
Zip tie them together to the back of the case to create a neat and slim prou001ffile.
Attach the case fan to the vented rear panel.
In other words your psu s fan will be facing downwards.
Yup connectors as labeled fan1 fan2 fan3 etc dont need to buy any molex cables and stuff right.
Some psu shroud do come with top vents that may allow you to position your psu fan up but if the bottom vents are given then it is better that you should keep the fan in.
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Line the screw holes in the fan up with the venting holes on the back of the case.
Position the fan over the vented area.
If your pc case has some sort of grill below where the psu sits then you should install your psu so that its intake fan is facing towards it.
Gather excess cabling together and tuck them away in an empty space such as an unused hard drive mount in front of the power supply.
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Continue arranging cables and zip tying them to the case until you are happy with your result.
These are 3 pin fans will they connect to this 4 pin speed controller.
Yup just connect the fan controller to the two molex connectors as the fan controller gets power through 2 molex connectors.
The reason for this is so the psu intake fan will suck cool air into the unit from outside the case.
Connect all the fan wires to the fan controller right.
If your pc case does not have a vent for the psu s fan then you should install the psu with its fan facing upwards.